dataset string | id string | question string | choices list | rationale string | answer string | subject string |
|---|---|---|---|---|---|---|
mmlu_stem | mmlu_stem_21148 | Electrical flow can be slowed down if there is an insulator | [
"protected",
"avoided",
"active",
"demoted"
] | null | C | |
mmlu_stem | mmlu_stem_11532 | Drawings of human colonies on other planets often picture the entire community under a glass or plastic bubble. The bubble is intended to create an atmosphere with adequate oxygen and other essential elements. But similar bubble-like structures have also been constructed on earth. One of the most famous, and controversial, is a site in the Arizona desert. Biosphere 2, as it is called, was built not far from Tucson in 1984 and is now run by Columbia University. This huge(7,200,000-cubic-foot)glass and steel construction contains several separate ecosystems, including a desert, a rain forest, and a 900,000-gallon "ocean." The climatic conditions-humidity, temperature, air quality-are regulated by sensors and can be adjusted as needed or desired. For example, a rainstorm can be created to increase the humidity. The adjustable features of Biosphere 2 make it an ideal location to perform experiments to help determine the effects of such climatic changes as global warming. The current conditions at Biosphere 2 are vastly different from those in 1993, when eight people who had moved into the environment with great fanfare two years earlier moved out in failure. Though promising to be self-sufficient , these "colonists" had so much trouble regulating the environment that they reportedly had food smuggled into them. Oxygen levels became dangerously low; most plants and animals died. In taking over the unsuccessful site, Columbia hopes to erase its notorious past by focusing on small research projects that gradually answer some of Biosphere 1's -- that is, Earth's most basic environment questions. The writer helps you understand what Biosphere 2 is like by _ . | [
"comparing its features with those of an outer space biosphere",
"explaining the process by which it was constructed",
"referring to an interview with one of former inhabitants",
"describing its appearance and conditions"
] | null | D | |
mmlu_stem | mmlu_stem_17442 | Which characteristic is most beneficial for an animal living on a snowy mountain? | [
"thick fur",
"dark spots",
"moist skin",
"webbed feet"
] | null | A | |
mmlu_stem | mmlu_stem_22093 | The temperature of a monitor lizard will increase if it | [
"goes into a hole underground",
"hides under a tree",
"swims in a fountain",
"leaves a rainy forest for a sunny desert"
] | null | D | |
mmlu_stem | mmlu_stem_4100 | As the nights get lounger, those who suffer from the winter blues will be planning ways to escape to the sunshine. But there may be a much simpler way of cheering yourself up... simply shining a bright light into your ear canal. Up to one in four Britons suffer from seasonal affective disorder, with seven per cent of the population having full-blown SAD. It is caused by the brain not receiving enough daylight which is needed to trigger serotonin , a hormone that regulates mood. Symptoms range from mild lethargy to depression and insomnia, but a cure might be in sight. Two clinical trials, run by Valkee - who make a device that can shine light into your ear - and the University of Oulu in Finland, have found that carefully targeted light can help prevent the condition. Juuso Nissila, Valkee's co-founder and chief scientist said: "We presented earlier that the human brain is sensitive to light". "These two clinical trials demonstrate that channeling bright light via ear canal into brain's photosensitive areas effectively prevents and treats seasonal affective disorder." The University of Oulu reported that in their first study, 92 per cent of the patients with seasonal affective disorder achieved full remission after a month of daily eight-to-12 minute doses of light from the Valkee. Time Takala, chief physician at the Oulu Deaconess Institute said: "These two trials show that bright light channeled into the brain via ear canal is an important future method to treat seasonal affective disorder." Valkee launched its bright light headset in August 2010. It is classed as a medical device under EU regulations. The device channels bright light direct to the brain via the ear canal to prevent and cure depression, mood swings and even circadian-rhythm disorders such as jet lag. It costs PS185 and looks like an iPod - only the earphones emit light rather than sound. We can know that _ regulates our mood from the passage. | [
"a hormone",
"serotonin",
"light",
"iPod"
] | null | B | |
mmlu_stem | mmlu_stem_12231 | Waiters wanted King Restaurant needs five waiters. If you want to find a new job, you can come here. Please call John at 678-5342. To get to the restaurant, you just have to cross North Road. It's next to the bank. Teachers wanted Do you want to be a teacher? Are you friendly to kids? Can you sing, dance or play the piano? We need a man teacher and a woman teacher to teach music. It's not difficult! Please call Mr. Clark at 415-3440. My lost pet My pet Nini is a small brown cat. I played ball games with Nini in Central Park last Saturday. Then she ran after the ball and did not come back. I am worried about her. If you see her, please call Sara at 283-2585. Thank you! Specials We have some great specials. We have different kinds of noodles, dumplings and soup. Would you like a big bowl of noodles for 12 yuan or a small one for just 8 yuan? You can also order our delicious chicken soup. It's only 9 yuan. Welcome to our restaurant! ,. If Mike only has 10 yuan, he can have _ . | [
"a small bowl of noodles",
"tomato and egg rice",
"a large bowl of noodles",
"dumplings and soup"
] | null | A | |
mmlu_stem | mmlu_stem_11056 | In an ideal world,people would not test medicines on animals. Such experiments are stressful and sometimes painful for animals,and expensive and timeconsuming for people. Yet animal experimentation is still needed to help bridge vast gaps in medical knowledge. That is why there are some 50 to 100 million animals used in research around the world each year. Europe,on the whole,has the world's most restrictive laws on animal experiments. Even so,its scientists use some 12 million animals a year,most of them mice and rats,for medical research. Official statistics show that just 1.1 million animals are used in research in America each year. But that is misleading. The American authorities do not think mice and rats are worth counting and,as these are the most common laboratory animals,the true figure is much higher. Japan and China have even less comprehensive data than America. Now Europe is reforming the rules governing animal experiments by restricting the number of animals used in labs. Alternatives to animal testing,such as using human tissue or computer models,are now strongly recommended. In addition,sharing all research results freely should help to reduce the number of animals for scientific use. At present,scientists often share only the results of successful experiments. If their findings do not fit the hypothesis being tested,the work never sees the light of day. This practice means wasting time,money,and animals' lives in endlessly repeating the failed experiments. Animal experimentation has taught humanity a great deal and saved countless lives. It needs to continue,even if that means animals sometimes suffer. Europe's new measures should eventually both reduce the number of animals used in experiments and improve the way in which scientific research is conducted. What is the main idea of this passage? | [
"The success of animal experiments should be ensured.",
"A ban on the use of animals in the lab should be enforced.",
"Greater efforts need to be taken to reduce the number of lab animals.",
"Scientists should be required to share their research results with each other."
] | null | C | |
mmlu_stem | mmlu_stem_21166 | If I wanted to protect my feet from getting blisters I might | [
"pour alcohol on them",
"burn my legs in fire",
"rub them in acid",
"wear thick colorful socks"
] | null | D | |
mmlu_stem | mmlu_stem_20646 | Which object is least likely to have any light pass through it? | [
"a dog",
"a plastic bottle",
"a prism",
"a window"
] | null | A | |
mmlu_stem | mmlu_stem_7171 | With winter fast approaching, flu season is here. People can easily catch the flu bug and they try to fight it with western medicine, traditional Chinese medicine or some homemade secret recipes. Yet some of these strategies are ineffective or even harmful, the best way to counter the flu is to protect us from contracting it. So here are some good habits to protect people from contracting flu from the very beginning. *During the day, keep the bedroom window open to let fresh air in. *Wash your face with cold water in the morning and wash your feet with hot water in the evening. This practice can help boost blood circulation and improve the body's resistance. *Do some exercises in the morning. such as jogging or shadowboxing for 10 minutes. *Rinse your mouth with salt water or tea every morning and every evening. This can help kill flu bacteria, clear phlegm and keep the mouth fresh. *Wear more clothes when it's cold and take some off when it's warm *Get a bottle of vinegar or Chinese white wine at hand and smell it now and then. Their pungent smell can help people get refreshed and improve their body's resistance. * Drink two kinds of beverages before going to bed, which can help people stay away from the flu: soup made of radish and vinegar, and tea made of fresh ginger . *Close the doors and windows and put a pot of boiling vinegar in the room Vinegar steam is a good way to kill flu bacteria in the air. According to the passage, we can know that the best way to fight the flu is to _ . | [
"take western medicine or traditional Chinese medicine",
"avoid getting it at the very beginning",
"use some homemade secret recipes",
"drink two kinds of beverages before going to bed in winter"
] | null | B | |
mmlu_stem | mmlu_stem_17197 | Which of these provide the best evidence that life could develop on Mars? | [
"its atmospheric gases",
"its surface temperatures",
"its craters and rocky surface",
"its ice and organic molecules"
] | null | D | |
mmlu_stem | mmlu_stem_13213 | On Thursday October 3, Adam Harper decided to stop drinking coffee. Adam is a MBA student at Harvard University. He studies long hours, gets very little sleep and as a result, he drinks a lot of coffee---anywhere from five to six cups a day. Recently, Adam felt that drinking thus much coffee was making it hard for him to sleep at all. He also began having problems with his concentration , and complained of stomachaches. Adam's doctor made this suggestions: stop drinking coffee altogether. When Adam got up on October 3, he began his day without his morning coffee. By 11:00 a.m., Adam was in a terrible mood . He was tired and had a headache. At 11:30, he had a meeting with his student advisor. In the meeting, he found it almost impossible to continue. What was going on? Caffeine, a chemical found in coffee, was most likely the reason for how Adam felt. Caffeine is a stimulant that boosts energy levels and improves concentration- but only for a short time. Lowering caffeine consumption often causes a drop in blood pressure and the result is a "coffee headache", People who stop drinking coffee often say they feel tired and moody, and find it hard to focus. The good news is that these feeling usually pass after four and five days. During this time, doctors suggested taking some aspirin for the headache. So, if Adam can wait, in less than a week, he may be feeling much better. The good news shows that _ . | [
"Adam will be better if he stops drinking coffee.",
"More and more people will give up coffee.",
"Aspirin can stop us thinking coffee",
"Coffee can never cause headaches."
] | null | A | |
mmlu_stem | mmlu_stem_11443 | The government-run command post in Tunis is staffed around the clock by military personnel, meteorologists and civilians. On the wall are maps, crisscrossed with brightly colors arrows that painstakingly track the fearsome path of the enemy. What kind of invader gives rise to such high-level monitoring? Not man, not beast, but the lowly desert locust . In recent months, billions of the 3-inch-long winged warriors have descended on Algeria, Libya, Morocco and Tunisia, blackening the sky and eating up crops and vegetation. The insect invasion, the worst in 30 years, is already creating great destruction in the Middle East and is now treating southern Europe. The current crisis began in late 1985 near the Red Sea. Unusually rainy weather moistened the sands of the Sudan, making them ideal seedbed for the locust, which lays its eggs in the earth. The insect onslaught threatens to create yet another African famine. Each locust can eat its weight (not quite a tenth of an ounce) in vegetation every 24 hours. A good-size swarm of 50 billion insects eats up 100,000 tons of grass, trees and crops in a single night. All $150 million may be needed this year. The U.S. has provided two spraying planes and about 50,000 gal. of pesticide. The European Community has donated $3.8 million in aid and the Soviet Union, Canada, Japan and China have provided chemical-spraying aircraft to help wipe out the pests. But relief efforts are hampered by the relative mildness of approved pesticides, which quickly lose their deadly punch and require frequent replications. The most effective locust killer dieldrin has been linked to cancer and is banned by many Western countries and some of the affected African nations. More than 5 million acres have been dusted with locust-killing chemicals; another 5 million will be treated by the end of June. On May 30, representatives of Tunisia, Algeria, Libya, Morocco and Mauritania will meet in Algiers to discuss tactics to wipe out the ravenous swarms. The move is an important step, but whatever plan is devised, the locust plague promised to get worse before the insects can be brought under control. People are alert at the threat of the locust because _ . | [
"the insects are likely to create another African famine.",
"the insects may blacken the sky.",
"the number of the insects increases drastically.",
"the insects are gathering and moving in great speed."
] | null | A | |
mmlu_stem | mmlu_stem_17679 | Magnesium strips are long, thin strips that are gray and shiny. Which action will lead to a chemical change of magnesium strips? | [
"putting them in the freezer",
"burning them with a candle",
"cutting them into small pieces",
"mixing them with pieces of copper"
] | null | B | |
mmlu_stem | mmlu_stem_13165 | You've probably heard of working dogs that help police officers, or horses that help farmers. Did you know that carrier pigeons can be trained to help people too? Here are some examples. Mailman Carrier pigeons can be trained to carry messages to people. The note is placed into a small can. The can is tied to the pigeon's leg. Then the pigeon flies off with the note. Lifeguard From high up in the sky, specially trained pigeons can find orange life jackets in the ocean. Sometimes it is difficult for humans to find people lost at sea, especially when the weather is bad. However, pigeons can fly quickly over a large area of water to look for people. Spy Many years ago, carrier pigeons were used to help our country during wars . "Spy pigeons" had small cameras that were tied to their feet. As a pigeon flew over enemy land, the camera took photos of the land below. This would allow our soldiers to see where the enemies were and what they were doing. So next time you see a pigeon, stop and watch it closely. What might look like an ordinary bird to most people, might actually be helpful. What kind of jobs are mentioned for a carrier pigeon? | [
"A mailman, a lifeguard and a spy.",
"A trainer, a spy and a police officer.",
"A soldier, a police officer and a mailman.",
"A farmer, a weather reporter and a lifeguard."
] | null | A | |
mmlu_stem | mmlu_stem_21538 | Succulents will die during winter months in canada without the aide of a | [
"glass structure",
"firehouse",
"smokehouse",
"bonfire"
] | null | A | |
mmlu_stem | mmlu_stem_15668 | Hong Kong Harbour Cruise By Night Enjoy your wonderful dinner on the ferry and see the fantastic city lights. Time: 7:00 pm~10:00 pm daily Price: With dinner Without dinner Adult: HK$300 HK$120 Child under 12: HK$ 210 HK$ 84 Start/ Stop: Kowloon Public Pier (Near Star Ferry Pier) Ticket Office:Star Company (123 Canton Road) If Mr. and Mrs. Brown want to have dinner on the ferry, how much will they pay? | [
"HK$300.",
"HK$600",
"HK$420",
"HK$520"
] | null | B | |
mmlu_stem | mmlu_stem_19726 | speed is a measure of how fast all these move but | [
"a person waiting",
"a fish swimming",
"a dog running",
"a bird flying"
] | null | A | |
mmlu_stem | mmlu_stem_2362 | invites applications for the following posts: HOUSEKEEPING Housekeeping Supervisor Salary: $1,200 per month At least 2 years similar experience Female only Housemaids Salary: $700 per month No experience required Part-time posts for Housemaids only LAUNDRY Laundry Valet Salary: $700 per month Duties - to collect and deliver laundry parcels Shift work require Laundry Attendant Salary: $700 per month Male applicants only Shift work required Preference will be given to people with some experience. FOOD AND DRINKS (for new 24-hour restaurant) Head waiter Salary: $1,200 per month Experienced waiters can apply Waiter/ Waiters Salary: $800 per month No experience needed (Willing to work shifts) Part-timers needed for permanent night shift 6 pm to 11 pm. GENERAL Car Driver Salary: $800 per month Clean driving record At least 1 year of experience Willing to work irregular hours Pool Attendant Salary: $700 per month Must know life-saving technique Some related experience Both posts for male only. Interviews will be conducted at the Royal Hotel, East Room, 2nd Level on the 25th and 26th Nov. from 10:00 to 4:00 pm. Which of these jobs require shift work? | [
"Housemaid and waiter.",
"Laundry valet and waiter.",
"Car driver and pool attendant.",
"Laundry attendant and pool attendant."
] | null | B | |
mmlu_stem | mmlu_stem_13238 | Jerry Green went to spend a year at the South Pole Station as the only doctor in 1998 when she 47. While working at the station that March. she discovered that there was a hard lump in her stomach. She knew it was cancer, but she wasn't able to go to a doctor for help. She couldn't leave the station for the next seven until the snow thawed. Dr. Green didn't wait for the death. But decided to fight against the cancer. She tried to about the lump to a hospital in the United States. The doctors said it was cancer. Without the proper wouldn't live for long. Soon a USA airplane came to provide her with some help. She started her own treatments after getting instructions from American doctors. She finally spent the long winter there before she returned home that October .Since then, she had become a incubus in support of cancer charities. She also wrote a best-selling book called Ice Bound. Sadly, Dr. Green's cancer finally returned. She died on June 23.2009. When did she start her own treatments? | [
"After searching the Internet.",
"After getting instructions from A merit an doctors.",
"After hearing from her paw law",
"After becoming a member in support of cancer charities."
] | null | B | |
mmlu_stem | mmlu_stem_13392 | Antifreeze is a liquid that is added to water to keep it from freezing. When water freezes and turns to ice,it expands .The force of water expanding is so great that it will break the hardest metal.Water is used in car engines to keep them cool while they run,and if this water is allowed to freeze in winter it can break the iron block of the engine.That is why antifreeze is necessary. Water freezes at 0degC;the usual kind of antifreeze will not freeze until the temperature is-40degC.A mixture of five parts of water and four parts of antifreeze will prevent freezing at-18degC;four parts of water and five parts of antifreeze reduce this to -22degC. Alcohol is a kind of good antifreeze,but when the air is running it becomes hot and the alcohol boils away,so it must be changed very often.Most people use antifreeze that does not boil away when the engine is running.There are several chemicals that do this.One of the most popular is called ethylene glycol. The text is written to _ . | [
"tell us what antifreeze is",
"make people buy antifreeze",
"tell us that cars need antifreeze",
"show us how to protect car engines"
] | null | A | |
mmlu_stem | mmlu_stem_15630 | Did you hear of the supercomputer? Recently, China's Tianhe-1 was ranked as the world's fastest supercomputer, according to a new list of world's TOP 500 supercomputers. It took 200 Chinese scientists two years to build the fastest supercomputer. It can do 2,507 trillion calculations in a second! That means it will take a personal computer 600 years to finish the work that a supercomputer does in a day! The US now leads the world in the area of supercomputers. It is home to more than half of the world's top 500 supercomputers. Japan also has advanced technology. China is developing its supercomputer technology quickly. But experts say it will take years before China's total computing power can catch up with that of the US. Supercomputers can work on many different things. They can solve problems in areas like national defense , energy and science. In business, you can also use supercomputers. Oil companies use them to find oil and gas. Banks use them for quick trades. Food companies even use supercomputers to make sure that they put potato chips into cans without breaking them. To make a supercomputer, scientists first need to link thousands of small computers together. Then they use software to turn them into one supercomputer. In fact, any person with enough knowledge about computers can make a supercomputer. But you need the top technology to make a supercomputer run fast. Which of the following is true? | [
"A personal computer needs 300 years to finish the work that a supercomputer does in a day.",
"Japan now leads the world in the area of supercomputers.",
"Supercomputer can be used by food companies.",
"Scientists needn't use software to turn small companies into one supercomputer."
] | null | C | |
mmlu_stem | mmlu_stem_7463 | The nervous-looking young man had waited for a few moments--outside the jeweler's before he got enough courage to enter. He was warmly greeted by a young assistant. James felt a rush of blood to his face as he explained he would be bringing in his future wife to choose a birthday present. The assistant listened carefully and told him he'd better buy a necklace. He wasn't used to buying jewellery and was a little worried about over-spending. After some discussion as to a reasonable price and the type, the assistant showed him dozens of necklaces and helped him to choose. At last James chose one and left the shop promising to return at five o'clock. When, half an hour later than planned, James did return to the shop with his future wife, Laura, the assistant acted as if she had never seen him before. When she was asked to show them some necklaces, she first brought out some inexpensive ones for them to choose, and then gave them the one she had prepared. A choice was soon made and they went away satisfied. James would certainly come back to buy what he wanted. James and Laura reached the shop at _ . | [
"4:30",
"5:00",
"5:30",
"6:00"
] | null | C | |
mmlu_stem | mmlu_stem_2761 | The World Health Organization estimates that more than 4 million people die each year from the effects of smoking tobacco . That number is increasing. WHO officials expect 150 million people to die from tobacco use in the next twenty years. Seven in ten of those deaths will be in developing countries. These numbers are frightening. Yet people around the world continue to smoke. It is not easy to stop smoking. However, doctors say you will live longer if you do stop smoking. You will feel better and look better. You will also protect the health of family members who breathe in your smoke. The American Cancer Society says there is not just one right way to stop smoking. It says that one method or a unit of methods may be successful. These include attending self-help programs or following directions in a book. The group says any way to stop smoking that is legal, moral and effective is worth trying. This could include taking long walks or spending time in areas where smoking is not allowed. Also, you could eat a small piece of fruit instead of having a cigarette. The American Cancer Society says the sooner smokers stop smoking, the more they reduce their chances of getting cancer and other diseases. It says blood pressure returns to normal twenty minutes after a smoker smoking the last cigarette. Carbon monoxide (CO) gas levels in the blood return to normal after eight hours. In a day, the chances of a heart attack decrease. In a year, the risk of heart disease is half that of a smoker. We can infer from the passage that _ . | [
"WTO officials say that a person will live longer if he / she stops smoking",
"the smoker can affect the health of his or her family members",
"following any way can help you stop smoking",
"no matter how hard you try it, it is worth doing that"
] | null | B | |
mmlu_stem | mmlu_stem_16485 | Have you ever tried to understand something new on your own but found it a bit too difficult in books or on the Internet? Don't be worriedyou can get help at Khan Academy . Khan Academy is an online learning website created in 2007 by Salman Khan, an American teacher. In order to provide "a free world-class education to anyone anywhere",Khan offers more than 4,200 free micro lectures atkhanacademy.org. The classes cover fields like mathematics, biology, chemistry and finance. They usually last for just 10 to 15 minutes. Unlike traditional classes, Khan mainly offers courses for students below college level. The classes can also help those who are planning to take the SAT, an exam often required for students who wish to enter a college or university in the US. So how can you start your learning journey at Khan Academy? First of all,enter the website with a personal e-mail account .Your personal homepage at Khan Academy is designed to help you learn math. You can take a pre-test first to see your level. The academy then suggests exercises at the right level for you. It also allows you to watch videos and improve yourself until you reach level 5the highest level. If you are interested in other subjects, click "LEARN" to see all topics on offer. Try "Art History",for example. This will take you to all the things in that area like text articles, videos and questions. You can also put key words into the search box to see related topics. Don't worry if you find it difficult to follow the courses in English. The courses have been translated into other languages, such as Chinese. Hundreds of Khan's courses in Chinese can be found on Netease (www. 163. com),which offers translations of courses from Harvard, Yafe, Oxford,Cambridge and other top universities. Khan Academy is a learning website that _ | [
"was started by an American teacher",
"has a history of over 10 years",
"doesn't provide free lectures",
"is fit only for college students"
] | null | A | |
mmlu_stem | mmlu_stem_21323 | Many things happen when the seasons change. One example is when plants go from big and bloomed to | [
"space",
"bigger",
"dead",
"gigantic"
] | null | C | |
mmlu_stem | mmlu_stem_11943 | Lying in the sun on a rock, the cougar saw Jeb and his son, Tom, before they saw it. Jeb put his bag down quickly and pulled his jacket open with both hands, making himself look big to the cougar. It worked. The cougar hesitated, ready to attack Jeb, but ready to forget the whole thing, too. Jeb let go of his jacket, grasped Tom and held him across his body, making a cross. Now the cougar's enemy looked even bigger, and it rose up, ready to move away, but unfortunately Tom got scared and struggled free of Jeb. "Tom, no!" shouted his father. But Tom broke and ran and that's the last thing you do with a cougar. The second Tom broke free, Jeb threw himself on the cougar, just as it jumped from the rock. They hit each other in mid-air and both fell. The cougar was on Jeb in a flash, forgetting about Tom, which was what Jeb wanted. Cougars are not as big as most people think and a determined man stands a chance, even with just his fists. As the cougar's claws got into his left shoulder, Jeb swung his fist at its eyes and hit hard. The animal howled and put its head back. Jeb followed up with his other fist. Then out of the corner of his eye, Jeb saw Tom. The boy was running back to help his father. "Knife, Tom" shouted Jeb. The boy ran to his father's bag, while Jeb stated shouting as well as hitting, to keep the cougar's attention away from Tom. Tom got the knife and ran over to Jeb. The cougar was moving its head in and out, trying to find a way through the wall Jeb was making out of his arms. Tom swung with the knife, into the cougar's back. It howled horribly and ran off into the mountains. The whole fight had taken about thirty seconds. Which of the following happened first? | [
"The cougar jumped from the rock",
"Tom struggled free of his father",
"Jeb asked Tom to get the knife",
"Jeb held Tom across his body"
] | null | D | |
mmlu_stem | mmlu_stem_20400 | Cameras reflect | [
"a persona",
"good decisions",
"UV rays",
"the stars"
] | null | C | |
mmlu_stem | mmlu_stem_7024 | When an ant dies, other ants move the dead insect out. Sometimes, the dead ant get moved away very soon--within an hour of dying. This behavior is interesting to scientists, who wonder how ants know for sure--and so soon--that another ant is dead. One scientist recently came up with a way to explain this ant behavior. Dong-Hwan Choe is a biologist. Choe found that Argentine ants have a chemical on the outside of their bodies that signals to other ants, "I'm dead--take me away." But there's a _ to Choe's discovery. Choe says that the living ants--not just the dead ones--have this death chemical. In other words, while an ant crawls around, perhaps in a picnic or home, it's telling other ants that it's dead. What keeps ants from dragging away the living ants?Choe found that Argentine ants have two additional chemicals on their bodies, and these tell nearby ants something like, "Wait--I'm not dead yet." So Choe's research turned up two sets of chemical signals in ants: one says, "I'm dead," and the other set says, "I'm not dead yet." Other scientists have tried to figure out how ants know when another ant is dead. If an ant is knocked unconscious, for example, other ants leave it alone until it wakes up. That means ants know that unmoving ants can still be alive. Choe suspects that when an Argentine ant dies, the chemical that says "Wait-I'm not dead yet" quickly goes away. Once that chemical is gone, only the one that says "I'm dead" is left. "It's because the dead ant no longer smells like a living ant that it gets carried to the graveyard, not because its body releases new unique chemicals after death," said Choe. When other ants detect the "dead" chemical without the "not dead yet" chemical, they drag away the body. Understanding this behavior may help scientists figure out how to stop Argentine ants from invading new places and causing problems. Choe would like to find a way to use the newly discovered chemicals to spread ant killer to Argentine ant nests. The ants' removal behavior is important to the overall health of the nest. "Being able to quickly remove dead individuals and other possible sources of disease is extremely important to all animals living in societies, including us," says Choe. "Think about all the effort and money that we invest daily in waste management." Ants judge whether another one is dead or not depending on _ . | [
"the sense of taste",
"the sense of smell",
"the sense of touch",
"the sense of sight"
] | null | B | |
mmlu_stem | mmlu_stem_10538 | Our village carpenter , John Hill, came one day and made a dining table for my wife. He made it just the right size to fill the space between the two windows. When I got home that evening, John was drinking a cup of tea and writing out his bill for the job. My wife said to me quietly, "It's his ninth cup of tea today." But she said in a loud voice, "It is a beautiful table, dear, isn't it?" "I will decide about that when I see the bill, " I read: One dining table, 10 November, 1989. Cost of wood: $17.00 Paint: $1.50 Work: 8 hours ($1 an hour) $8.00 Total: $36.50 When I was looking at the bill, John said, "It's been a fine day, hasn't it? Quite sunny." "Yes," I said, "I'm glad it is only the 10thof November." "Me, too," said John. "You wait. It'll be a lot colder by the end of the month." "Yes, colder.... And more expensive! Dining tables will be $20 more expensive on November 30th, won't they, John?" John looked hard at me for half a minute. Was there a little smile in his two blue eyes? I gave his bill back to him. "If it isn't too much trouble, John," I said, "Please add it up again and you can forget the date." I paid him $26.50and he was happy to get it. Why did the writer say that dining table would be$ 20 more expensive on November 30th? _ | [
"Because it was difficult to make dining tables in cold weather.",
"Because paint would be more expensive.",
".Because the cost of wood would be more expensive.",
".Because he thought John would certainly add to the cost of the dining table."
] | null | D | |
mmlu_stem | mmlu_stem_17799 | Mitochondria are cell organelles that play a large role in energy processes within the body. Which cells are most likely to have a greater amount of mitochondria? | [
"skin",
"bone",
"blood",
"muscle"
] | null | D | |
mmlu_stem | mmlu_stem_16437 | On a hot summer day, a little boy decided to go for a swim in the lake behind his house. In a hurry to swim in the cool water, he ran out of the back door, leaving behind his shoes, socks, and shirt as he went. He flew into the water, not noticing that in the middle of the lake, a crocodile was swimming to the bank. His mother in the house saw the two as they got closer and closer. She quickly ran to the lake, shouting to her son as loudly as she could. Hearing her voice, the little boy swam quickly to his mother, but he was too slow. Just as he reached her, the crocodile reached him, too. The mother caught her little boy by the arms just as the crocodile caught his legs. There was a tug of war between the two. The crocodile was much stronger than the mother, but the mother didn't give up. A farmer happened to drive by. He heard her shouts, and then tried his best to kill the crocodile. After spending weeks in the hospital, the little boy felt well. His legs were scarred by the animal and on his arms there were deep scars, too. His mother's hands had deeper scars because she wouldn't let go. The newspaper reporter interviewed the boy. He asked the boy if he would show him his scars. The boy said to the reporter proudly, "Look at my arms. I have great scars on my arms. I have them because my mom wouldn't let go." The little boy _ when he heard his mother's shouts. | [
"swam to the middle of the lake",
"quickly ran toward the water",
"ran out of the back door of his house",
"swam quickly towards his mother"
] | null | D | |
mmlu_stem | mmlu_stem_1097 | Kailey and LeAnn were preparing a report on ocean tides. Which information should they include in their report concerning the greatest influence on the strength of a high tide in a particular area? | [
"the position of the Moon around Earth",
"the position of Earth around the Sun",
"the rotation of the Moon",
"the rotation of Earth"
] | null | A | |
mmlu_stem | mmlu_stem_6830 | American farmers are raising five percent more goats for meat these days. Goat meat is high in protein and lower in unhealthy fat than many other meats.Even so,the industry is small compared to chicken,beef and pork. But immigration has brought more of a taste for goat to America from all over the world. Experts from the University of Illinois offer some questions for people to consider if they are thinking about raising goats. First of all,do you understand that there always has to be someone to care for the goats? *How much land do you have available? And how good is it? Poor ground may support two to four goats on half a hectare.Better grassland can support six to eight. If goats and cattle share the land,two goats can be added for each cow. The goats will eat weeds and other plants that cattle do not like. *Do you have buildings for the number of female goats you plan to keep during winter? An open,cold,dry barn is better than a closed,warm barn where the air is wet. *Do you have the equipment to clean barns and to harvest hay to feed your goats? Or will you get someone else to do it,or buy the hay? The experts say a profitable business in goat meat may take three to five years to establish.And, of course, there are no guarantees . If someone has two hectares of good grass land, what is the maximum number of cows and goats he can raise? | [
"32 cows and 64 goats.",
"32 cows and 32 goats.",
"16 cows and 32 goats.",
"8 cows and 16 goats."
] | null | C | |
mmlu_stem | mmlu_stem_155 | What is the most likely outcome of the Moon moving away from Earth? | [
"A lunar day is shorter.",
"A lunar eclipse lasts longer.",
"Earth moves closer to the Sun.",
"Earth's tides decrease in size."
] | null | D | |
mmlu_stem | mmlu_stem_14267 | When you're not at home,many worries may start to crowd your mind.Did I turn the coffee maker off?Did I lock the door?Are the kids doing their homework or watching television?With a smart home,you can quiet all of these worries. A smart home is a home with a communication network.This network connects devices ,such as lights and TV sets,and allows them to be controlled from far away through electrical wiring,mobile phone communication or WiFi over the internet. More and more people may start to consider owning a smart home,because it makes life much more convenient.It can help keep your room at a certain temperature.It can record what happens inside the home and send the video to your phone.When you are on vacation abroad,you can use a smart home controller to switch on or off the electricity when necessary.Some smart homes can receive a visitor,allowing him to come in and offering him a drink.They can even feed the cat and water the plants. Besides,smart homes are easy to fix.Most smart home technology and devices are wireless and can be set up with a minimum of tools,using only the guiding information.When a problem appears,you can deal with it yourself without paying a professional. However,for home-users,the smart home technology is far from perfect.It can be rather expensive to own the technology and the devices.Also,because the smart home system allow its owner to get home information from anywhere,it leaves the home easy to be attacked by hackers ,who may secretly use or change the information in the system. Now,many scientists are excited at the future of smart home technology.Imagine being able to get fashion advice from your mirror,or receive food shopping suggestions from your refrigerator.While there are others who worry that those smart devices will make people lazier and lonelier.Whatever it is,one thing is for sure---smart home technology will change the way we live and work. According to the passage,nowadays a smart home can lock the door through _ . | [
"electric lights",
"mirror technologies",
"mobile phones",
"shopping programs"
] | null | C | |
mmlu_stem | mmlu_stem_1286 | Sugar is made up of many molecules. When sugar is dissolved in water, what happens to these molecules? | [
"They no longer exist.",
"They exist in solution.",
"They evaporate.",
"They combine with water to form new elements."
] | null | B | |
mmlu_stem | mmlu_stem_22506 | Which would likely need a hot plate? | [
"physics class",
"chemistry class",
"english class",
"math class"
] | null | B | |
mmlu_stem | mmlu_stem_8641 | Promised yourself to quit smoking in the new year, but just can't stop lighting up? You're not alone, with an Australian survey showing that only 3 percent of smokers who made such resolutions stuck with them. An online poll of just over 1,000 people, conducted ahead of the launch of a video game designed to help smokers quit, showed one in four Australians made New Year's resolutions to quit ---- but more than half went back on their word within a week.Some 15 percent lit up within hours of making the pledge, the survey showed, The research revealed that seven out of ten smokers have tried to kick the habit at some point. "Our research shows that the majority of smokers in Australia want to quit but are struggling to stick to their resolution.For most people, the desire to stop smoking is not enough, "Edward Fong, general manager of Ubisoft, the videogame manufacturer selling the anti-- smoking software, said in a statement. According to the survey, Australian smokers light up an average of 13.8 cigarettes every day or 5,037 cigarettes a year.There are currently 2.63 million smokers in Australia, which equates to 16 percent of the population over the age of 18, with women on average making more attempts to quit than men.The World Health Organization says smoking kills about 4 million people each year, causing a quarter of deaths related to heart disease.The organization estimates that by 2030, more than 8 million people will die from tobacco - related causes each year, mainly in developing countries. What is the population over the age of 18 in Australia? | [
"2.63million.",
"4 million.",
"16.44 million.",
"8 million."
] | null | C | |
mmlu_stem | mmlu_stem_2287 | Which of these mixtures would be easiest to separate? | [
"Fruit salad",
"Powdered lemonade",
"Hot chocolate",
"Instant pudding"
] | null | A | |
mmlu_stem | mmlu_stem_13258 | Lions are big and strong.They have bright eyes, sharp teeth and black points on their brown bodies.So they look beautiful. Lions can run fast.They are good at catching other animals.Lions like living as a family until baby lions are 2 years old.A lion lives alone during most of its life. Now, many hunters hurt lions for their fur and meat.They sell their meat to people for meals.They use their fur to make clothes and bags.We must stop this.It is wrong for people to kill lions.We can write to newspapers about the danger the lions are facing.We should tell the government and people about the problems.If we do nothing, soon there will be no lions in the world any more! When do baby lions begin to live alone? | [
"20 years old",
"12 years old",
"2 years old",
"22 years old"
] | null | C | |
mmlu_stem | mmlu_stem_18866 | A ball is thrown straight up. Which statement best describes the motion of the ball while the ball is at the maximum height? | [
"The speed and acceleration are constant.",
"The velocity is zero, and the acceleration is constant.",
"The speed and acceleration are changing.",
"The velocity is zero, and the acceleration is changing."
] | null | B | |
mmlu_stem | mmlu_stem_3457 | 400-year-old plants from the Little Ice Age were brought back to life, which could help us understand how the Earth will deal with climate change. Moss found buried beneath the Teardrop glacier on Ellesmere Island in Canada has been brought back to life. Findings suggest that these plants could help repopulate regions exposed by melting ice caps. Plants that were buried beneath thick ice in Canada more than 400 years ago and were thought to have frozen to death have been brought back to life by Canadian scientists. Samples of the moss plant, covered by the glacier during the Little Ice Age of 1550 to 1850 AD, were replanted in a lab at the University of Alberta and grew new stems . Researchers now think these findings can give indication as to how regions can recover as the ice covering them melts. Biologist Dr. Catherine La Farge and her team at the University of Alberta were exploring the region around the Teardrop glacier on Ellesmere Island. Ice on Ellesmere Island region has been melting at around four meters each year for the past nine years. This means that many areas of land that were previously covered by ice have since been exposed. Many ecosystems that were thought to have been destroyed during the Little Ice Age between 1550 and 1850 AD can now be studied, including many species that have never been studied before. While examining an exposed area of land, La Farge and her team discovered a small area of moss called Aulacomnium turgidum. It is a type of bryophyte plant that mainly grows across Canada, the US and the Highlands of Scotland. Dr La Farge noticed that the moss had small patches of green stems, suggesting it is either growing again or can be encouraged to repopulate. Dr La Farge told the BBC, "When we looked at the samples in detail and brought them to the lab, I could see some of the stems actually had new growth of green branches, suggesting that these plants are growing again, and that _ When we think of thick areas of ice covering the landscape, we've always thought that plants have to come from refugia , never considering that land plants come from underneath a glacier. It's a whole world of what's coming out from underneath the glacier that really needs to be studied. The ice is disappearing pretty fast. We really have not examined all the biological systems that exist in the world; we don't know it all." Dr La Farge took samples of the moss and, using carbon-dating techniques, discovered that the plants date back to the Little Ice Age. Dr La Farge's team took the samples, planted them in dishes full of nutrient-rich potting soil and fed them with water. The samples were from four separate species including Aulacomnium turgidum, Distichium capillaceum, Encalypta procera and Syntrichia ruralis. The moss plants found by Dr La Farge are types of bryophytes. Bryophytes can survive long winters and regrow when the weather gets warmer. However, Dr La Farge was surprised that the plants buried under ice have survived into the twenty-first century. Her findings appear in proceedings of the National Academy of Sciences. Dr La Farge's research is of great importance to _ . | [
"knowing what the plants during the Little Ice Age were like",
"understanding how ecosystems recover from glaciers.",
"regrowing many species that have been destroyed before.",
"figuring out the effects of melting ice caps on moss."
] | null | B | |
mmlu_stem | mmlu_stem_7570 | Botany, the study of plants, plays a strange role in the history of human knowledge. For many thousands of years it was one field about which humans had little knowledge. It is impossible to know today just what our Stone Age Ancestors knew about plants, but from what we can observe of preindustrial societies that still exists, a detailed learning of plants and their properties must be very ancient. This is reasonable. Plants are the basis of the food pyramid for all living things, even for other plants. They have always been greatly important to the good of peoples, not only for food, but also for clothing, weapons, tools, medicines, housing, and a great many other purposes. Tribes living today in the woods of the Amazon recognize hundreds of plants and know many properties of each. To them botany, as such, has no name and is probably not even recognized as a special branch of knowledge at all. Unfortunately, the more industrialized we become the farther away we move from direct relation with plants, and the less clear our knowledge of botany grows. Yet everyone comes unconsciously on a surprising amount of botanical knowledge, and few people will fail to recognize a rose or an apple. When our New Stone Age ancestors, living in the Middle East about 10 000 years ago, discovered that certain grasses could be harvested and their seeds planted for richer production the next season, the first great step in a new connection of plants and humans was taken. Grains were discovered and from them flowed the _ of agriculture: planted crops. From then on, humans would increasingly take their living from the controlled production of a few plants, rather than getting a little here and a little there from many varieties that grew wild and the collected knowledge of tens of thousands of years of experience and close relations with plants in the wild would begin to disappear. According to the passage, why has general knowledge of botany decreased? | [
"People no longer value plants as a useful resource.",
"Botany is not recognized as a special branch of science.",
"Research is unable to keep up with the increasing number of plants.",
"Direct relation with a variety of plants has decreased."
] | null | D | |
mmlu_stem | mmlu_stem_16870 | Soon computers and other machines will be able to remember you by looking at your eyes! The program works because everyone's eyes are different. So in the future you won't have to remember a number when you want to use a machine or take money out of a bank. You'll just have to look at the machine and it will be able to tell who you are. The eye-recognition program is already being tested in shops and banks in the USA, Britain and France. Soon, this technology will change all other ways of finding out who people are. However, scientists are working on other systems. Machines will soon be able to know you from the shape of your face or hands or even your smell! We already have machines that can tell who you are from your voice or the mark made by your fingers. Eye-recognition is better than other kinds because your eyes don't change as you get older, or get dirty like hands or fingers. And even twins have different eyes, so the program can be up to 94% correct, depending on how good the technology is. Some programs may only be right 51% of the time. In Britain, it was found that 91% of people who had tried it said that they liked the idea of eye-recognition. In the future your computer will be looking at you in the eye. So smile! How does the eye-recognition program work? | [
"You type a number.",
"You look at the machine.",
"The machine listens to your voice.",
"You need to walk with the machine."
] | null | B | |
mmlu_stem | mmlu_stem_14392 | Winter solstice, as the name shows, means the coming of winter. As an important solar term in the traditional Chinese calendar, it is also a traditional holiday for Chinese, which is also called "", "","", etc. Generally, winter solstice occurs between December 21st and 23rd. According to the traditional Chinese calendar, five days constitutes a pentad and three pentads constitutes a solar term. One year is divided into twelve periods and twelve climates which are regarded as twenty-four solar terms. The Winter Solstice is one of twenty-four solar terms. On this day, in the Northern Hemisphere the period of daytime is the shortest of the year and the period of night is longest. . In Northern China during winter solstice there is a custom of eating dumplings. On winter solstice the period of night is _ in China. | [
"the longest",
"the shortest",
"darkest",
"brightest"
] | null | A | |
mmlu_stem | mmlu_stem_989 | A single-cell organism can do everything a cell from a multicellular organism can do except | [
"specialize.",
"reproduce.",
"use energy.",
"make protein."
] | null | A | |
mmlu_stem | mmlu_stem_10059 | The next generation of smart phone could combine the date from its gyroscopes with a built-in compass to allow you to track your indoor movements even without GPS. Research described it in the international Journal of Innovative Computing and Applications by Shahid Ayub of Lancaster University, and his colleagues there and at HW Communications, suggests that the embedded inertial sensors in many smart phones have added the facility to be used for localization and tracking applications. The primary benefit of using smart phones is that no additional infrastructure would need to be installed for monitoring personnel movements in a wide variety of situations not least staff, equipment and inventory movements in warehouse facilities, shopping malls and factories. In contrast, other technology being proposed would require new equipment,such as RFID technologies. However, smart phones do not yet have the ability to pinpoint their location without recourse to the GPS system, which is not accessible indoors and has the added disadvantage of using up battery power very quickly even if it could be used. Inertial navigation only provides the necessary information to a specified starting point the team says. This is useful for anyone with a non-GPS smart phone who wishes to track the route they take when walking or jogging if they specify their starting point. The team suggests that pedestrians indoors could be positioned using a combination of the smart phone accelerometer and an built-in digital compass, something that will become available in future smart phones. They have now investigated the potential of three different smart phone placement modes: idle, hand held and listening, which could be used with pedestrian dead reckoning (PDR) techniques to allow users to record the path they follow or for various kinds of workplace or other monitoring requirements. "The technique could be used in underground tube stations, airports , train stations where there is no infrastructure installed for tracking or navigation," Ayub explains, "It can also be used for location-based service applications. In big shopping malls it becomes easier to navigate to a target shop or meeting place, while in large offices and across industry it could be used to track employees and control movements of workers in restricted areas." What is the primary benefit of using smart phones with embedded inertial sensors? | [
"They require new equipment, such as RFID technologies.",
"They can track pedestrian movement indoors with GPS.",
"No additional infrastructure would be needed.",
"No additional money would be spent."
] | null | C | |
mmlu_stem | mmlu_stem_5648 | Plants have family values, too; it seems, with new research suggesting they can recognize close relatives in order to work together. An ability to tell family from strangers is well known in animals, allowing them to cooperate and share resources, but plants may possess similar social skills, scientists believe. Susan Dudley and Amanda File of McMaster University in Ontario, Canada, report they have demonstrated for the first time that plants can recognize their kin. This suggests that plants, though lacking recognition and memory, are capable of complex social interactions. "Plants have this kind of hidden but complicated social life," Dudley said. The study found plants from the same species of beach-dwelling wildflower grew aggressively alongside unrelated neighbors but were less competitive when they shared soil with their families. Sea rocket, a North American species, showed stronger and healthier root growth when planted in pots with strangers than when raised with relatives from the same maternal family, the study found. This is an example of kin selection, a behavior common in animals in which closely related individuals take a group approach to succeeding in their environment, the researchers said. Kin selection also applies to competition, because if family members compete less with each other, the group will do better overall. "Everywhere you look, plants are growing right up next to other plants," Dudley said," Usually it's a case of each plant for itself. But sometimes those plants are related, and there are benefits to not wasting resources on being competitive, and there is not really a cost to not being competitive as long as your neighbor is also not being competitive." Learning and memory appear to be important for kin recognition in animals, but this isn't an option for plants, she noted. Some researchers speculate that plants communicate through their roots, identifying themselves using tiny chemical signatures specific to each plant's family. From the passage,we learn that _ . | [
"sea rocket is a South American species",
"sea rocket grows aggressively alongside unrelated neighbors",
"sea rocket grows aggressively alongside its siblings",
"sea rocket is a kind of bush without flowers"
] | null | B | |
mmlu_stem | mmlu_stem_19080 | The reason that ducks are such excellent swimmers is because | [
"ducks have a space between their toes",
"ducks are buoyant and resilient",
"ducks have wide feet",
"ducks have extra foot skin"
] | null | D | |
mmlu_stem | mmlu_stem_19565 | I need electrical energy to | [
"Go running",
"cook some bread",
"Ride a bike",
"Go swimming"
] | null | B | |
mmlu_stem | mmlu_stem_7659 | Farmers could grow more rice and shaky Internet communications could work better someday, thanks to prize-winning discoveries by teenage scientists showed at a national science fair on Monday. High school scientists from across the United States showed off work in genetics, molecular biology, mathematics and other fields that judges said rose to the professional level. "It just blows me away. They're all just unimaginable," said Joel Spencer, aprefix = st1 /New YorkUniversityprofessor who served as judge at the Sidemen's Westinghouse Competition in Math, Science and Technology. Research done by finalists in the nationwide competition could lead to faster Internet speeds, more effective antibacterial drugs and better energy conservation. One team researched black holes in outer space, while another examined more than 700 fossils to better understand why dinosaurs died out. Juliet Girard and Roshan Prabhu won $ 100,000 scholarship for their work proving genes that help some kinds of wild rice flower earlier than others. Drawing on a database that described the genetic makeup of rice, the two students, fromJersey City,New Jersey, identified two genetic sections that directed wild rice to blossom an average of 10 days earlier than the ordinary short-grain rice that feeds much of the world. Their discovery could allow genetic engineers to develop a new strain that would take less time to reach maturity, allowing farmers to produce more and extending the growing region into colder climates. Steven Byrnes of Lexington,Massachusetts, took the top individual prize for his theory describing outcomes in a two-player game called Chomp. _ competed at the national science fair. | [
"Some university scientists",
"A lot of high school students",
"Some farmers and computer designers.",
"School science teachers from across theUSA"
] | null | B | |
mmlu_stem | mmlu_stem_21394 | if a person travels on foot from home to school, which of these is given off? | [
"a release of vitamins",
"a release of water vapor",
"a blaze of fire",
"a release of heat"
] | null | D | |
mmlu_stem | mmlu_stem_10809 | When people search online, they leave a trail that remains stored on the central computers of firms such as Google, Yahoo and Microsoft. Analyzing what we're looking for on the Web can offer a remarkable understanding of our anxieties and enthusiasms. UK writer John Battelle wrote on his blog, "This can tell us extraordinary things about who we are and what we want as a culture." Google's experimental service Google Trends, for example, compares the numbers of people searching for different words and phrases from 2004 to the present. According to these graphs, sometimes people's interests are driven obviously by the latest news: when the Spice Girls, a pop group, announce a reunion, there's an immediate rush to find out more about them. Other results are strikingly seasonal: people go shopping online for coats in winter and sandals in summer. The most fascinating possibility is that search data might help predict behavior. Perhaps we search for a political candidate's name when we are thinking about voting for him or her. This information could clearly be useful to a marketer - it's already how Google decides which ads to show on its search results pages - or to a political campaign manager. Marissa Mayer, a Google vice-president, argues that Google Trends correctly "predicted" George Bush's victory over John Kerry in the 2004 election. The graph clearly shows that Bush continued his lead over Kerry, in terms of search volumes, even when polls suggested _ . However, that's not always the case. For instance, the same approach predicted Hillary Clinton would beat Barack Obama in the race for the Democratic presidential nomination in 2008 turned out to be wrong in the end. According to the passage, Google are able to see the trails of the people when they are _ . | [
"using their computers",
"installing the Internet",
"using its search engine",
"connecting their computer to another one"
] | null | C | |
mmlu_stem | mmlu_stem_1064 | Which of the following structures is not present in animal cells? | [
"cell membrane",
"cell wall",
"mitochondrion",
"nucleus"
] | null | B | |
mmlu_stem | mmlu_stem_17057 | My name is Tom Black. This is my cousin, Jack Smith. That is his dog. That computer is my cousin's. The orange notebook is his, too. I have a good friend. Her name is Mary Smith. Is this her watch? No, it isn't. It is black, It is mine. Hers is white. _ has ( ) a computer. | [
"Jack",
"Tom",
"Mary",
"Black"
] | null | A | |
mmlu_stem | mmlu_stem_9712 | "Mom, I have cancer." These four words catapulted my son and me on a journey that lasted two years. On that day I felt a wave of paralyzing fear. Scott was the oldest of my four children. He was 33 years old and a successful assistant principal at SamRayburn Hifht School in Pasadena, Texas. He and his wife Carolyn were busy raising four active children. Scott was 6'2'', weighed 200 pounds and had never been sick a day in his life. A few month earlier a mole on his neck had changed color. "Dr.Warner called," Scott said that spring morning. "It's melanoma. " I tried to comfort him, naming all the people I knew who had survived skin cancer. Yet, I felt small tentacles of fear begin to wrap around my chest. Our next stop was MDAnderson, the famous cancer hospital in Houston. Scott had surgery at the end of May and was scheduled for radiation treatments over the summer recess. "There is an 80 percent chance it won't reoccur," the doctors said. At the end of summer, all his tests came back negative and Scott was back at school in the fall. However, in December, Scott discovered a lump on his neck. It was examined and the result came back "malignant. " We now realized that Scott fell into the 20 percent category. I could feel the tentacles tightening around my chest. He entered the hospital for an aggressive treatment, a combination of interferon and interleukin. After five months of treatment, he had radical surgery on his neck. The test results were encouraging, only three of the 33 lymph nodes removed were malignant. We were very hopeful. For the next six months, Scott's follow-up visits went well. Then in October, X-ray revealed a spot on his lung. The spot was removed during surgery and the doctors tried to be optimistic. It was a daily battle to control the fear and panic each setback brought. In January, he was diagnosed as having had a "disease explosion." The cancer had spread to his lungs, spine and liver and he was given three to six months to live. There were times during this period when I felt like I was having a heart attack. _ When you watch your child battle cancer, you experience a roller coaster of emotions. There are moments of hope and optimism but a bad test result or even an unusual pain can bring on dread and panic. Scott was readmitted to the hospital for one last try with chemotherapy. He died, quite suddenly, just six weeks after his last diagnosis. I was completely destroyed. I had counted on those last few months. The next morning I was busy notifying people and making funeral arrangements. I remember having this nagging feeling that something was physically wrong with me. It took a moment to realize that the crushing sensation in my chest was gone. The thing every parent fears the most had happened. My son was gone. Of course, the fear had been replaced by unbearable sorrow. After you lose a child, it is so difficult to go on. The most minimal tasks, combing your hair or taking a shower, becoming monumental. For months I just sat and stared into space. That spring, the trees began to bloom; flowers began to pop up in my garden. Friendswood was coming back to life but I was dead inside. During those last weeks, Scott and I often spoke about life and death. Fragments of those conversations kept playing over and over in my mind. "Don't let this ruin your life, Mom." "Make sure Dad re models his workshop." "Please, take care of my family." I remember wishing I could have just one more conversation with him. I knew what I would say, but what would Scott say? "I know how much you love me, Mom. So just sit on the couch and cry." No, I knew him better than that. Scott loved life and knew how precious it is. I could almost hear his voice saying, "Get up Mom, Get on with your life. It's too valuable to waste." That was the day I began to move forward. I signed up for a cake decorating class. Soon I was making cakes for holidays and birthdays. My daughter-in-law told me about a writing class in Houston. I hadn't written in years, but since I was retired I decided it be time to start again. The local college advertised a Life Story Writing class that I joined. There I met women who had also lost their children. The Poet Laureate of Texas was scheduled to speak at our local Barnes and Noble. I attended and joined our local poetry society. I never dreamed that writing essays and poems about Scott could be so therapeutic. Several of those poems have ever been published. In addition, each group brought more and more people into my life.. I don't believe you ever recover from the loss of a child. Scott is in my heart and mind every day. However, I do believe you can survive. Scott fought so bravery to live and he never gave up. He taught me that life is a gift that should be cherished, not wasted. It has taken years to become the person I am today. The journey has been a difficult, painful process but certainly worth the effort and I know that my son would be proud. The author intends to tell us that _ . | [
"it takes a long time to make a person recover from the shock of losing a child",
"Scott is proud of his mother",
"life is full of happiness and sorrow.",
"We'd better make our life count instead of counting your days."
] | null | D | |
mmlu_stem | mmlu_stem_12277 | I have two good friends .They are Peter and Gina .Here are two photos .The first one is a photo of Peter's family , and the next one is a photo of Gina's room . In the first photo , you can see four people . They are Peter's parents , Peter and his sister .Peter's father is a teacher . And his mother is a teacher too .Can you see the boy on the bed ? That's Peter . A red hat is on his head .Who is the girl ? Oh , she is Peter's sister . Her name is Nancy . In the next photo , you can see a tidy room . It's Gina's room . A blue desk , a yellow chair , a green bookcase and a white bed are in it . A computer and some CDs are on the desk .Her red schoolbag is on the chair .A dictionary is on the bed . Gina's room is very clean and tidy . .Where is Peter in the first photo ? | [
"he is on the sofa",
"He is on the chair",
"He is on the bed",
"He is under the desk"
] | null | C | |
mmlu_stem | mmlu_stem_9184 | Scientist Florence Wambugu works with farmers in Kenya, a country in East Africa. She helps them grow bigger and better crops. Wambugu is especially interested in finding simple ways to produce more food. In the past ten years, Wambugu has spent much of her time studying sweet potatoes, which are an important food in her part of Kenya. A virus kept attacking the plants. It stopped the sweet potatoes from growing well. Because of the virus, some farmers lost three quarters of their crops. Wambugu went to war against the virus. Her research for a way to save the sweet potatoes led to a lab in St. Louis, Missouri. The lab mainly works on genes , the chemical "computer programs" found in the cells of living things. Genes tell a plant to produce pink flowers or an animal to grow black hair. Now scientists have found ways to move genes from one living thing to another. That process is called genetic engineering. Wambugu spent three years in the lab. As a result, she created a sweet potato plant that could fight off the virus. Wambugu tested her research in Kenya, and her plants produced wonderful sweet potatoes. That's just the beginning, Wambugu believes. Genetically modified foods, she thinks, could help farmers in poor countries grow badly needed crops, thus, fewer people will go hungry. What is Wambugu's attitude toward "genetic engineering"? | [
"It will help more hungry people.",
"It should be carefully used.",
"It has more disadvantages than disadvantages.",
"It is a too expensive technology at present."
] | null | A | |
mmlu_stem | mmlu_stem_6055 | How to apply for a free mailbox ? First you have to connect to the Internet and go to the homepage of the ICP providing free mailboxes. Then you will find an icon , an agreement about the rules for using the free mailbox will appear. If you want to go, click the icon "I agree". Then you have to fill in a form about your basic personal data, and the name and PIN of the mailbox. The PIN is the key to the mailbox. After finishing these, you will get a mailbox like this:your name @ mail server (for example:tvguide@mail.cctv.com.cn. "tvguide" is the name of the mailbox, and "mail.cctv.com.cn" is the name of the mail server.). The mailbox is separated into two parts by a separator "@", which is read as "at". The former part is the name of the mailbox. The latter is the domain name of the mail server. All mails to you will be received by the server and put into your mailbox. You can read these mails on any computer on the Internet in the world, if you have the name and PIN of the mailbox. The mailbox's name in the e-mail address "editor@ew.com.cn." is _ . | [
"ew",
"ew.com.cn",
"com.cn",
"editor"
] | null | D | |
mmlu_stem | mmlu_stem_7443 | Kayaking is an activity enjoyed by many people of all ages. It requires little or no experience and nearly anyone of any skill level can participate. It's most popular as a summertime sport, but it is also a great activity during the winter. Kayaking also seems ly friendly to the environment; more so than speed boating or water skiing. Because a kayak doesn't create large or frequent waves, require fuel, or scatter hazards into the air, it is indeed a fairly safe activity for humans and wildlife alike. Kayaking on freshwater lakes and streams creates little turbulence and therefore does not disturb fish or other aquatic life. Actually, the gentle paddling and movement of the kayak helps to bring seaweed to the surface, making for convenient snacking to the fish. However, there is a drawback to the all-you-can-buffet for your fishy friends. In addition to bringing food to the surface, kayaking also stirs up litter that's been hiding beneath the waters. Some aquatic animals will mistake it for food. This could cause the animals to choke on the indigestible litter, leading to death. As hazardous as this sounds, it isn't very likely for such an event to take place. Most litter in lakes and streams is found along the shoreline and settles in the sand and dirt, and isn't likely to drift away to the main body of water. ^ . And because kayaks do not have a motor, fish have no risk of getting caught underneath the boat. One potential hazard that results from kayaking is human waste. This depends solely on where you plan to kayak, and if there are resources available (such as campsites) along the shoreline. When there are no facilities in sight, you're paddling in the middle of a lake, and nature calls, then often you are given no choice but to expel your waste in the middle of the water. While human waste is considered biodegradable, it can be harmful when swallowed by fish. The only preventative measure is to avoid using the water as a restroom. Some public lakes and streams have taken steps to preserve the quality of the water by requiring permits for kayaking. This won't eliminate a human waste problem, but does help regulate entry into the lake and prevent it from becoming overcrowded. As an important factor to remember when kayaking is that you are a guest in someone else's home. You may not be greeted by anyone or be able to kick up your feet and watch TV, but the water is home to many aquatic animals and wildlife. Just as you would not throw trash on the floor or destroy the home of another, you shouldn't do it outdoors either. Keep all trash with you in your kayak and properly dispose of it after you return to shore. By doing your part, you will help doing your part, you will help keep kayaking a safe and enjoyable activity for yourself and the environment. Which word or expression is closest in meaning to "biodegradable"? | [
"Recycled.",
"Environmentally harmless.",
"Poisonous.",
"Sustainable."
] | null | B | |
mmlu_stem | mmlu_stem_7450 | An exercise method (Gyrotonics) designed to stretch muscles and improve strength and balance is becoming popular in the United States. Here's more about Gyrotonics and the man who invented this special form of exercise. Gyrotonics is a kind of exercise that combines the movements of dancing and swimming with the mental and physical practice called yoga. It helps lengthen muscles, improve balance, and exercise the joints, the parts of the body where bones are joined. A Hungarian dancer named Juliu Horvath developed this special form of exercise. After he was injured in dancing, Mr. Horvath studied yoga intensely. In the 1980s, he developed a new exercise method as a special kind of yoga to strengthen dancers. According to Mr. Horvath, his method was based on the octopus ,monkey and cat. He says these animals have no restrictions. They can move in any direction the Gyrotonic movements to help the human body move more freely. A special machine made of wood and weights helps guide the body through the Gyrotonics exercises. You sit or lie on a flat board. You put your legs or hands through special cloth handles attached to a line with weights. With the tension created by the weights, you must try to move through the exercises. Seven kinds of backbone movements form the base of Gyrotonics. For example, you can stretch your back to the left and right or forward and backward. While moving your back, you can also work on arm or leg motions. These movements must be done in a smooth way. Often the motions are circular . When Juliu Horvath first developed Gyrotonics, he was the only teacher. Since then, he has taught almost 70 trainers. Now, there are more then 800 official schools in the world where you can learn Gyrotonics. What do you think inspired Horvath in developing Gyrotonics? | [
"His experience in dancing.",
"His use of a special machine.",
"The movements of some animals.",
"The ideas from many trainers."
] | null | C | |
mmlu_stem | mmlu_stem_21111 | Which likely would live in the hottest environment? | [
"bear",
"penguin",
"moose",
"scorpion"
] | null | D | |
mmlu_stem | mmlu_stem_17665 | A paper bag is ripped into pieces. Which of these BEST describes the pieces of the bag? | [
"Stronger than the whole bag",
"Thicker than the whole bag",
"Smaller than the whole bag",
"Darker than the whole bag"
] | null | C | |
mmlu_stem | mmlu_stem_19075 | In a bog, when water levels become low, | [
"bog animals may be thirsty",
"bog animals may search longer for nutrients",
"the bog produces more water",
"bog predators need more prey"
] | null | B | |
mmlu_stem | mmlu_stem_3720 | Few people would question the value of taking part in sports for young people . With proper training , supervision , protective equipment and techniques , and a proper emphasis on winning , sports can develop a healthy body and spirit and a life-long interest in being active and fit . Without such measures , childhood sports can lead to injuries and even paralysis or death . Even in the best conditions , no activity can be risk-free. But most serious are preventable. Cyclists and football players can reduce their risks by wearing helmets, hockey players by wearing masks;basketball and tennis players by wearing eye guards; baseball players by wearing batting helmets . Besides, risks to individual players can often be found , and thus prevented , through a properly performed medical exam before a child plays . For accidents that cannot be preventable , having an emergency plan and first-aid equipment , and someone trained to use the equipment, can be lifesaving . Still , each year , according to the American College of Sports Medicine , more than 775,000 children under 14 are treated in emergency rooms for sports injuries , nearly half of them preventable . An estimated 300,000 athletes experience exercise-related head illnesses each year , and almost all of them should have been avoided . Further , from half to three-fourths of sports-related concussions are never even diagnosed ; the injured are often sent back to play too soon and put a risk of another more serious brain-damaging concussion . To help reduce these risks , the National Center for Sports Safety , with the National Athletic Trainers' Association , offers a three-hour online safety course for coaches for $28 at It is implied in the passage that _ . | [
"prevention of injuries is not paid enough attention to",
"children under 14 are more easily hurt in sports",
"most head illnesses are related with exercise",
"none of the head illnesses should have happened"
] | null | A | |
mmlu_stem | mmlu_stem_13925 | Have you ever hoped a toy balloon? They are very light. But there are much bigger balloons can fly very high up in the sky. They are big enough to carry people. They are called hot-air balloons. To make a hot-air balloon go up, turn on the burner . That will make the air inside the balloon hotter. Then the balloon will go up. To make the balloon go down, turn off the burner. The air inside the balloon will get cooler. Then the balloon will go down. Underneath(....) the balloon there is a large basket. That is where the pilot and the passengers go. The burner is just above the basket. You can stand in the basket and turn the burner on and off. The balloon will go where the wind is blowing the right way! Do you want the balloon to go somewhere special? First make sure the wind is blowing the right way! People have been flying in hot-air balloons for over two hundred years. Before planes it was the only way of flying. Today people fly in hot-air balloon for fun. Some people like to race hot-air balloons. You want the balloon to go up. So you will _ | [
"jump out of the balloon",
"let the air out of the balloon",
"make the air inside the balloon hotter",
"let the air inside the balloon cool down"
] | null | C | |
mmlu_stem | mmlu_stem_1094 | A student notices that an inflated balloon gets larger when it is warmed by a lamp. Which best describes the mass of the balloon as a result of this change? | [
"The mass of the balloon increases because the size of the balloon has increased.",
"The mass of the balloon increases because the temperature of the balloon has increased.",
"The mass of the balloon stays the same because the gas inside the balloon still has the same mass after it warms up.",
"The mass of th... | null | C | |
mmlu_stem | mmlu_stem_20627 | Which is the most dangerous to trees? | [
"sunlight",
"javascript",
"oxygen",
"industrial saws"
] | null | D | |
mmlu_stem | mmlu_stem_7505 | Edward Wilson The Future of Life, . Edward Wilson is America's, if not the world's, leading naturalist. In The Future of Life, he takes us on a tour of the world's natural resources . How are they used? What has been lost? What remains and is it able to continue with the present speed of use? Wilson also points out the need to understand fully the biodiversity of our earth. Wilson begins with an open letter to the pioneer in environment protection, Henry David Thoreau. He compares today's Walden Pond with that of Thoreau's day. Wilson will use such comparisons for the rest of the book. The problem is clear: man has done great damage to his home over the years. Van the earth, with human help, be made to return to biodiversity levels that will be able to support us in the future? Biodiversity, Wilson argues, is the key to settling many problems the earth faces today. Even our agricultural crops can gain advantages from it. A mere hundred species are the basis of our food supply, of which but twenty carry the load. Wilson suggests changing this situation by looking into ten thousand species that could be made use of, which will be a way to reduce the clearing of the natural homes of plants and animals to enlarge farming areas. At the end of the book, Wilson discusses the importance of human values in considering the environment. If you are to continue to live on the earth, you may well read and act on the ideas in this book. How many species are most important to our present food supply? | [
"Twenty.",
"Eighty.",
"One hundred",
"Ten thousand."
] | null | A | |
mmlu_stem | mmlu_stem_22308 | Which likely has the highest force exerted upon it? | [
"the palm of your hand",
"a pillow for sleeping",
"a home run baseball",
"a button on a keyboard"
] | null | C | |
mmlu_stem | mmlu_stem_9993 | Millions of people die of hunger in Southern Africa every year, but when prefix = st1 /Zambiawas offered thousands of tons of free maize by theUS, the government politely said no. "We don't know whether the food is safe," said Zambia's Commerce, Trade and Industry Minister Dipak Patel. His worries are shared by countries around the world that are _ aboutAmerica's genetically modified (GM) crops. Just last week, EU member nations were discussing whether or not to import GM sweet corn from theUS. Ever since people started farming, they have tried to crossbreed plants to make them stronger or better tasting. At one time, only related plants could be crossed with each other. But when GM techniques were developed in the 1970s, scientists were able to put a single gene from a living creature into an unrelated creature. This means they can make crops more productive and resistant to disease by adding genes from other species. They can also create food with special characteristics, such as "golden rice", which is enriched with vitamin A. But many people believe GM foods are a health risk. "If left to me, I would certainly not eat GM foods," said Scottish scientist Arpad Pusztai. "We are putting new things into food which haven't been eaten before. The effects on the immune system are not easy to predict." At the moment, the official argument is that GM foods "are not likely to present risks for human health". But there are still many questions to be answered as the foods are produced in different ways. Some experts believe the genetic material added to plants can transfer to humans and give damage to our bodies. Further harm could be caused by the genes from GM plants crossbreeding with naturally produced crops. What's the author's attitude? | [
"Supportive.",
"Neutral.",
"Doubtful.",
"Critical."
] | null | B | |
mmlu_stem | mmlu_stem_18979 | If someone is experiencing frequent falls | [
"they should move out of their house",
"they should just stop trying to walk",
"they should try wearing slicker bottomed shoes",
"they should try putting down carpet or throw rugs"
] | null | D | |
mmlu_stem | mmlu_stem_17166 | Which of the following is most consistent with the modern theory of evolution? | [
"Parents pass their physical traits to their offspring; those offspring with traits that help them survive in the environment are able to reproduce.",
"Parents change their physical traits in order to survive in the environment, then those parental traits are passed to their offspring.",
"Life on this planet ca... | null | A | |
mmlu_stem | mmlu_stem_4213 | Scientists have long had it in their mind to make a robot lizard . They began with finding out why a lizard can hang on a wall. They noticed the lizard's toes were unique: They have suckers , which enable it to hang on walls. They, therefore, made a robot with suckers on its hands and feet. The robot could hang on the wall but fell off when crawling. So, they went on researching. 6 years ago, scientists discovered that suckers only were not enough. It is the bristles on each foot that adds friction and static adsorption that makes a lizard move on the smooth wall easily without falling down. Then scientists made great efforts to fix thick bristles to the robot's hands and feet. However, the effect was not satisfactory. The robot still couldn't attach itself firmly to the wall. Scientists got puzzled: How on earth can the lizard crawl on an extremely smooth wall or even on a ceiling without dropping off? An accidental finding inspired them: One day a scientist happened to see an animal attack a lizard and bite off its tail. The lizard broke away from the animal's teeth and threw itself on a wall to escape, only to fall off heavily on the ground. The scientist wondered: Is it the tail that plays an important role in its travelling on the wall? He caught some lizards for an experiment. The result proved his assumption: A tailless lizard has no trouble walking on an ordinary wall but can't on a smooth one. A further study showed the lizard's tail can prevent it falling over backward and, what's more, that the tail acts as an additional leg while one of the lizard's legs leaves the wall, which is always the case while it is walking on the wall. Thus, Tailbot, a super tailed robot, is born. What part(s) would be a must if scientists just wanted a robot which can hang on the wall? | [
"Suckers.",
"Suckers and bristles.",
"Suckers, bristles and a tail.",
"Hands, feet, bristles and a tail. Ks5u"
] | null | A | |
mmlu_stem | mmlu_stem_7806 | Many jobs must be done with two people. One person takes the lead. The other helps. So it is with the human body. Much of our body depends on the cooperation between substances. When they work together, chemical reactions take place smoothly. Body systems are kept in balance. Some of the most important helpers in the job of good health are the substances we call vitamins. The word "vitamin" dates back to Polish scientist Casimir Funk in 1912. He was studying a substance in rice. Funk believed the substance belonged to a group of chemicals known as amines . He added the Latin word "vita", meaning life. So he called the substance a "vitamine"--an amine necessary for life. Other studies found that not all vitamins were amines. So the name was shortened to vitamin. But Funk was correct in recognizing their importance. Scientists have discovered 14 kinds of vitamins. They say vitamins help to carry out chemicals changes within cells. If we do not get enough of the vitamins, we are at risk of developing a number of diseases. _ brings us back to James Lind of Scotland. In the 1740s, Lind was a doctor for the British Navy. He was investigating a problem that had existed in the Navy for many years. The problem was the disease scurvy . The sailors were weak from bleeding inside their bodies. Even the smallest wound would not heal. Doctor Lind thought the sailors were getting sick because they failed to eat some kinds of foods when they were at sea for many months. Doctor Lind separated twelve sailors who had scurvy into two groups. He gave each group different foods to eat. One group got oranges and lemons. The other did not. The men who ate the fruit began to improve within seven days. The other men got weaker. However, which foods should be eaten to keep us healthy? Let us look at some important vitamins for these answers. Doctor Lind proved eating fruits can prevent scurvy by means of _ . | [
"comparing",
"analyzing",
"surveying",
"questioning"
] | null | A | |
mmlu_stem | mmlu_stem_17819 | In a closed system, what happens to the total energy of the system as energy conversions take place? | [
"It increases.",
"It decreases.",
"It remains constant.",
"It is transferred out of the system."
] | null | C | |
mmlu_stem | mmlu_stem_17739 | During which chemical process is energy absorbed? | [
"iron nails rusting",
"candles burning",
"vegetables rotting",
"plants photosynthesizing"
] | null | D | |
mmlu_stem | mmlu_stem_13408 | Jack Green is 75 years old. He is not in good condition. "I think I'm ill," he tells his wife, "I feel awful. I've got a headache and I don't feel like eating." "You've put on a lot of weight recently. You should see the doctor," his wife says, "ask him how to lose weight. It's not good for your health." "OK," says Jack. He goes to see a doctor. The doctor checks his heart and weighs him. Then he says, "You are too heavy. You need to do some excercise to lose about 30 kilograms. Run two miles a day for the next 100 days. Then call and tell me your weight." A week later, the doctor receives a call from Jack. "Doctor, I ran two miles every day and I feel much better. But I have a new problem." "What's that?" asks the doctor. "I'm 14 miles away from home, and I can't find my way back." Choose the right answer according to the passage. What's Jack's new problem? | [
"He forgets how many miles to run.",
"He can't find his way back home.",
"He runs for such a long time.",
"He loses a lot of weight."
] | null | B | |
mmlu_stem | mmlu_stem_3459 | 400-year-old plants from the Little Ice Age were brought back to life, which could help us understand how the Earth will deal with climate change. Moss found buried beneath the Teardrop glacier on Ellesmere Island in Canada has been brought back to life. Findings suggest that these plants could help repopulate regions exposed by melting ice caps. Plants that were buried beneath thick ice in Canada more than 400 years ago and were thought to have frozen to death have been brought back to life by Canadian scientists. Samples of the moss plant, covered by the glacier during the Little Ice Age of 1550 to 1850 AD, were replanted in a lab at the University of Alberta and grew new stems . Researchers now think these findings can give indication as to how regions can recover as the ice covering them melts. Biologist Dr. Catherine La Farge and her team at the University of Alberta were exploring the region around the Teardrop glacier on Ellesmere Island. Ice on Ellesmere Island region has been melting at around four meters each year for the past nine years. This means that many areas of land that were previously covered by ice have since been exposed. Many ecosystems that were thought to have been destroyed during the Little Ice Age between 1550 and 1850 AD can now be studied, including many species that have never been studied before. While examining an exposed area of land, La Farge and her team discovered a small area of moss called Aulacomnium turgidum. It is a type of bryophyte plant that mainly grows across Canada, the US and the Highlands of Scotland. Dr La Farge noticed that the moss had small patches of green stems, suggesting it is either growing again or can be encouraged to repopulate. Dr La Farge told the BBC, "When we looked at the samples in detail and brought them to the lab, I could see some of the stems actually had new growth of green branches, suggesting that these plants are growing again, and that _ When we think of thick areas of ice covering the landscape, we've always thought that plants have to come from refugia , never considering that land plants come from underneath a glacier. It's a whole world of what's coming out from underneath the glacier that really needs to be studied. The ice is disappearing pretty fast. We really have not examined all the biological systems that exist in the world; we don't know it all." Dr La Farge took samples of the moss and, using carbon-dating techniques, discovered that the plants date back to the Little Ice Age. Dr La Farge's team took the samples, planted them in dishes full of nutrient-rich potting soil and fed them with water. The samples were from four separate species including Aulacomnium turgidum, Distichium capillaceum, Encalypta procera and Syntrichia ruralis. The moss plants found by Dr La Farge are types of bryophytes. Bryophytes can survive long winters and regrow when the weather gets warmer. However, Dr La Farge was surprised that the plants buried under ice have survived into the twenty-first century. Her findings appear in proceedings of the National Academy of Sciences. Which of the following would be the best title for the passage? | [
"Bryophyte ecology is greatly affected by climate change.",
"400-year-old moss's survival is a mystery to solve.",
"Moss in ancient times was discovered in Canada.",
"400-year-old plants were brought back to life."
] | null | D | |
mmlu_stem | mmlu_stem_17422 | The most common way humans contribute to the extinction of organisms is by | [
"rotation of crops.",
"use of fertilizers.",
"destruction of habitat.",
"introduction of competing species."
] | null | C | |
mmlu_stem | mmlu_stem_21855 | A mouse give birth to ____ while a bird give birth to ____ | [
"mouse eggs; live babies",
"live babies; unhatched eggs",
"live babies; live babies",
"mouse eggs; rat eggs"
] | null | B | |
mmlu_stem | mmlu_stem_12676 | Mr. Smith is thirty one .He is tall and heavy , and he has short hair . He likes children and his job .He works at school and gives the children classes from Monday to Friday .He often has much work to do , but he often plays games with his students after school .All his students like him very much .On Sunday he drives to his parents' house and stays with his father and mother .Sometimes he goes to see his friends on Sundays .He drives back to school on Monday morning . Mr. Smith goes home . | [
"in his car",
"on a bus",
"on foot",
"by bike"
] | null | A | |
mmlu_stem | mmlu_stem_16492 | An old couple was having problems remembering things, so they decided to go to their doctor to makesurenothing was wrong with them. When they arrived at the doctor's, they explained to the doctor about the problems they were having with their memory. After checking the couple out, the doctor told them that they were physically fine but advised them to start making notes to help them remember things. Later that night, while watching TV, the old man got upfromhischair and his wife asked, "Where are you going?" He replied, "To the kitchen." She asked, "Will you get me a cup of icecream?"He replied, "Sure." She then askedhim, " Shouldn't you write it down so you can remember it?" He said, "No, I can remember that." When the man was walking towards the kitchen, the woman shouted , "Dear, I would also like some strawberries on top. You had better write that down because I know you'll forget that." He answered, "I can remember that. You want acupof ice cream with strawberries." She added, "Well, I also would like somecreamon top. I know you will forget that so please write it down." With anger inhisvoice, he said, "I don't need to write that down! I can remember that." He then went into the kitchen. After about 20 minutes, he returnedfromthe kitchen and handed her a plate of bacon and eggs. She stared at the plate for a moment and said angrily, "You forgot my bread!" From the passage we can know that the old couple _ . | [
"still had something wrong with their memory after seeing the doctor",
"had poor health, so they went to see their doctor",
"obeyed their doctor's advice and carried it out successfully",
"got theirmemoryimproved after seeing the doctor"
] | null | A | |
mmlu_stem | mmlu_stem_11211 | Many people believe that the common garden slug[ is nothing more than a pest that should be wiped out. In attempts to beautify their yards, people employ various poisons, strategically chosen plants, and gardening techniques. Success is attained when no trace of slugs can be found, although the worn-out gardener still watches and waits for their return, as completely ridding a garden of slugs is almost impossible. Experts, however, have discovered that the slug's evil reputation as an enemy of home gardeners may, in fact, be groundless to some degree. Although it is true that a slug can devour[ garden plants from the roots up in amazing quantities, it also produces nutrients for the soil, which help other plants grow. The diet of a slug consists of plant waste and mould, as well as living plants, making it a sort of natural recycling center. The unique structure of a slug digestive system enables it to take these discarded products, transform them into the nutrients that plants need, and then release those nutrients harmlessly as wastes. To some, this situation is unacceptable. No gardener wants to sacrifice his or her plants just to gain a few nutrients that could easily be provided by fertilizers In order to achieve a balance, both slug and gardener may have to compromise some things. One ly easy step is to separate plants with high slug appeal from those with low appeal. That way, the sections of the garden spared for plants with high slug appeal can contain plants that the gardener is willing to sacrifice so as to protect those plants that have a lower slug appeal . Another possibility is to leave some ground-covering plants in a less tidy state, since slugs particularly enjoy semi-decayed plant matter. The slugs will then be drawn toward this decaying matter instead of toward the living plants. These measures may seem slow and difficult but they are still preferable to commercial slug repellents for several reasons. The topsoil of a garden is often highly lacking in nutrients, due to chemical damage caused by just such products. The fertilizer industry sells millions of pounds of dirt mixed with the nutrients necessary for a healthy garden every year. Yet these are the very same minerals that a healthy slug population would provide at no cost. Moreover, since slugs find newly dead slugs highly appetizing. the slug population is unlikely to decrease significantly as a result of these severe measures. Commercial slug repellents are not advisable, because they _ | [
"do chemical harm to the top soil of a garden",
"make chemical fertilizers not so effective",
"make products not so healthy for eating",
"they help slugs reproduce more quickly"
] | null | A | |
mmlu_stem | mmlu_stem_16464 | Gina has a small room at home. Look! This is her room. Some things are in her room. Her schoolbag is on her desk. Her red jacket is on her bed. An E-dictionary is on her bed, too. It's Grace's. Grace Smith is her friend. Her books are on the sofa. And her teacher Mr. Green's pen is in the bookcase. She borrowed it. She has a set of keys in her desk. She has a computer game. A model plane is under her desk. It is her father--Tim Miller's. Her mother--Emma Miller's sweater is in her room, too. According to the article , we know _ . | [
"Gina's books are on the table",
"the keys are on her desk",
"Gina's sweater is in the room",
"Gina's schoolbag is on her desk"
] | null | D | |
mmlu_stem | mmlu_stem_17229 | Rolanda is growing tomato plants in her garden. She has created a compost pile and has been adding compost around her tomato plants to help fertilize them. Compost is solid waste in which organic material is broken down by microorganisms in the presence of oxygen to where it can be safely stored, handled, and applied to the environment. On what does Rolanda primarily rely in order for composting to work? | [
"producers",
"consumers",
"scavengers",
"decomposers"
] | null | D | |
mmlu_stem | mmlu_stem_12082 | A rocket began countdown . It was a common sound in the 1960s. But this was not just another countdown. It was the beginning of a historic event. It was the countdown of Apollo 11 -the space fligh that would carry men to the first landing on the moon. In the spaceship at the top of the rocket were three American astronauts whose names would soon be known around the world: Neil Armstrong. Edwin Aldrin and Michael Collins. Neil Armstrong was the commander of the spaceship. Edwin Aldrin was the pilot of the moon lander. The astronauts gave it the name the Eagle. Michael Collins was the pilot of the command module , Columbia. He would wait in orbit around the moon while Armstrong and Aldrin landed and explored the surface. On Earth, all activity seemed to stop. President Richard Nixon gave federal government workers the day off to watch the moon landing on television. Around the world, 500 million people watched the television report. Countless millions more listened on their radios. Armstrong and Aldrin started the lander rocket engine. It slowed the spacecraft and sent it down toward the landing place. It was in an area known as the "Sea of Tranquility ". The moon lander, controlled by a computer, dropped toward the airless surface of the moon. 140 meters from the surface, the astronauts look control of the lander from the computer. They moved the Eagle forward, away from a very rocky area that might have caused a difficult landing. It took the astronauts more than three hours to complete the preparations for leaving the lander. It was difficult - in the Eagle's small space - to get into space suits that would protect them on the moon's surface. Finally, Armstrong and Aldrin were ready. They opened the door. Armstrong went out first and moved slowly down the ladder. At 2:56 on July 20th, 1969, Neil Armstrong put his foot on the moon. "That's one small step for man,"he said, "one giant leap for mankind." The "Eagle" in the passage is _ . | [
"a rocket",
"a spaceship",
"a moon landere",
"a command module"
] | null | C | |
mmlu_stem | mmlu_stem_22390 | To calculate distance divided by time you would need a | [
"multi-meter",
"speedometer",
"Geiger counter",
"seismograph"
] | null | B | |
mmlu_stem | mmlu_stem_754 | Kerry made a simple flashlight. She recorded the following statements in her lab book. Which statement is an inference? | [
"The wire was 35 cm long.",
"The flashlight contained a battery.",
"The plastic switch was better than the metal switch.",
"The bulb was lit for 20 minutes before it burned out."
] | null | C | |
mmlu_stem | mmlu_stem_19092 | Lightness may be seen reflected more clearly and brighter off of lighter colored objects, so an example would be | [
"a mirror is unable to be dark",
"phone screens are barely reflective",
"a lilac door is easily seen",
"a black door is easily seen"
] | null | C | |
mmlu_stem | mmlu_stem_15203 | Do you like doing sports every day? A lot of people like doing sports because they can help them to keep fit. Today Yoga is women's favorite kind of sports. But many people like to watch others to play ball games. They like Yao Ming and David Beckham very much. Yao Ming plays basketball very well. David Beckham is good at playing football. People often watch their favorite players or teams on TV. When they watch them on TV, they feel excited. Sports change with the seasons. People play different games in different seasons. They will swim in summer and skate in winter. In autumn, they enjoy playing volleyball and tennis. They love going on a trip in spring. Doing sports is good for people's health. Swimming is suitable for the hot weather but skating is great for the cold weather. Swimming in some places is popular. People living near the sea or lakes or rivers often swim in summer. Many American families do some sports at the weekend. They are happy and healthy. Why do many people like to do sports every day? | [
"Because they can make friends.",
"Because they can play with other people.",
"Because they can keep healthy.",
"Because they want to see Yao Ming."
] | null | C | |
mmlu_stem | mmlu_stem_14766 | The planets aren't the only wanderers of the sky. There're some things even farther and longer. Long after people were no longer afraid of planets, they still thought the comets were bad objects that traveled in the sky. They were afraid that the comets would suddenly land on the earth and hurt them. But, in fact, even if a comet did hit the earth, nothing much happened. A comet is really a harmless thing. Comets have round heads and long tails , and they are very bright. Sometimes they look like heads with long hair flying with them. That's why they're called comets. Comet means long-haired. Like the stars and planets, comets are far away. But we can know its size. The head of a small comet is as wide as the Pacific Ocean. And a big comet's head is ten times as big as the earth. Its tail is millions of kilometers long. Then why wouldn't the great big thing hurt us if it hit the earth? Because it isn't solid. It's thin like cloud. Its tail is nothing but bright gas. And its head is made of small pieces and they could not hurt the earth. Some comets can be seen for a few months. Then they go away. Some of them come back in a certain number of years. Some are never seen again. Perhaps these comets that never return have broken into pieces. For some _ think that shooting stars are pieces of broken comets. Comets have long tail like _ , so we call them comets. | [
"long hair",
"round heads",
"round dishes",
"wide wings"
] | null | A | |
mmlu_stem | mmlu_stem_16361 | What are you going to do if you are in a burning house? How will you escape? Do you know how to save yourself? Please read the following passage. Escaping a fire is a serious matter.Knowing what to do during a fire can save your life.It is important to know the ways you can use and show them to everyone in the family,such as stairways and fire escapes,but not lifts. From the lower floors of the buildings,escaping through windows is possible,learn the best way of leaving by windows with the least chance of serious injury. The second floor window is usually not very high from the ground.An average person,hanging by the finger-tips will have a drop of about six feet to the ground.It is about the height of an average man.Of course,it is safer to jump a short way than to stay in a burning building. Windows are also useful when you are waiting for help.Be sure to keep the door closed.Or smoke and fire may be drawn into the room.Keep your head low at the window to be sure you get fresh air rather than smoke that may leaked into the room. On a second or third floor,the best windows for escaping are those that open onto a roof.From the roof a person can drop to the ground more safely.Dropping onto cement might end in injury.Bushes and grass can help to break a fall. It is possible to escape through the windows _ . | [
"if there are some bushes on the ground",
"if you are strong enough",
"if you live on a lower floor",
"If you have a long rope"
] | null | C | |
mmlu_stem | mmlu_stem_11005 | From the very beginning, Martin felt that he was bound up with(......)his lovely little patient. One day, following some tests , Betty gave the doctor a big hug . A few months later the doctor removed not only the tumour , but also the entire lower left side of Betty's gum and jawbone. Because Betty was so young, Martin was hopeful that her jawbone might regenerate. Within three months, Betty's tumour grew as large as an orange, changing the natural appearance of the left side of her small, delicate ( =" thin;" not strong)face. Soon she couldn't even close her mouth, and as her eating problems worsened, Betty 's weight dropped from 20 kilos to 15. Martin knew from experience that it might invade the brain. The only other possibility was thorough radiation therapy . Night after night, Betty's father gave her injection, but the tumour remained as big as ever. Then one evening. Morgan noticed that the tumour had begun to change. It was actually becoming smaller! For two months her tumour appeared to be going away for ever. In the coming months, Betty's tumour continued to appear. She was able to eat solid food once again. Her jawbone was regenerating. The tumour was gone. What did the doctors do two months later? | [
"They continued their observations.",
"They gave up the operation on Betty.",
"They found out what caused Betty's strange disease.",
"They declared that Betty's strange disease was cured."
] | null | B | |
mmlu_stem | mmlu_stem_17810 | Why does the leaf of a plant look green? | [
"Because it absorbs green light",
"Because it reflects green light",
"Because it absorbs only yellow and blue light",
"Because it reflects a mixture of yellow and blue light"
] | null | B | |
mmlu_stem | mmlu_stem_6489 | Google, the Internet search and mapping company, has developed a car that can steer without a driver. Sometimes the reality is stranger than science fiction: Google is road-testing cars that steer, stop and start without a human driver. The goal is to "help prevent traffic accidents, free up people's time and reduce carbon emissions." says Sebastian Thrun, who is the project leader for the driverless car, or Carbot. By developing the car and the software that drives it, Google wants to change how people get from place to p1ace. Eric Schmidt, one of the company's top officials, said, "Your car should drive itself. It just makes sense." So far, the driverless autos have gone about 140,000 miles on California roads without people taking over the driving. Many of the roads are very busy or full of curves that challenge human drivers. The autos' software makes it possible to know speed limits, traffic patterns and road maps. The vehicles use radar, lasers and video cameras to find other cars and avoid people crossing streets. There has only been one accident during the testing. And in that case, the Carbot was hit from behind by a human driver when Goog1e's car was stopped at a red light. Engineers say the driverless cars are safer than autos with people behind the wheel because the computers react much more quickly than humans. The Carbot is still in very early testing stages. Experts agree that it will be years before you will be able to buy one. But it is likely that one day you will be sitting in the driver's seat of a driverless car. When the auto was first invented it was called a "horseless carriage". Now it seems that it is time for the "driverless carriage" to be part of our 1ives. The advantage of the Carbot is that _ . | [
"it can drive all by itself",
"it can avoid any traffic accident",
"it doesn't pollute the environment",
"it is the most fashionable car nowadays"
] | null | A | |
mmlu_stem | mmlu_stem_7931 | If humans were truly at home under the light of the moon and stars,we would go in darkness happily,the midnight world as visible to us as it is to the vast number of nocturnal species on this planet. Instead,we are diurnal creatures, with eyes adapted to living in the sun's light. This is a basic evolutionary fact, even though most of us don't think of ourselves as diurnal beings. Yet it's the only way to explain what we've done to the night: We've engineered it to receive us by filling _ with light. The benefits of this kind of engineering come with consequences called light pollution whose effects scientists are only now beginning to study. Light pollution is largely the result of bad lighting design,which allows artificial light to shine outward and upward into the sky. III-designed lighting washes out the darkness of night and completely changes the light levels and light rhythms -- to which many forms of life, including, ourselves, have adapted. Wherever human light spills into the natural world, some aspect or life is affected . In most cities the sky looks as though it has been emptied of stars, leaving behind a vacant haze that mirrors our fear of the dark. We've grown so used to this orange haze that the original glory of an unlit nigh, - dark enough for the planet Venus to throw shadow on Earth, is wholly beyond our experience, beyond memory almost. We've lit up the night as if it were an unoccupied country, when nothing could be further form the truth. Among mammals alone, the number of nocturnal species is astonishing, Light is a powerful biological force, and on many species it acts as a magnet . The effect is so powerful that scientists speak of songbirds and seabirds being "captured" by searchlights on land or by the light from gas flares on marine oil platforms. Migrating at night, birds tend to collide with brightly lit tall buildings. Frogs living near brightly lit highways suffer nocturnal light levels that are as much as a million times righter than normal, throwing nearly every aspect of their behavior out of joint including most other creatures ,we do need darkness .Darkness is as essential to our biological welfare, to our internal clockwork, as light itself. Living in a glare of our making,we have cut ourselves off from our evolutionary and cultural heritage--the light of the stars and the rhythms of day and night .In a very real sense light pollution causes us to lose sight of our true place in the universe, to forget the scale of our being, which is best measured against the dimensions of a deep night with the Milky Way--the edge of our galaxy arching overhead. According to the passage, human being _ | [
"prefer to live in the darkness",
"are used to living in the day light",
"were curious about the midnight world",
"had to stay at home with the light of the moon"
] | null | B | |
mmlu_stem | mmlu_stem_9458 | VOIP stands for Voice Over Internet Protocol. It is also referred to as IP Telephony. It is another way of making phone calls, though the 'phone' part is not always present any more, as you can communicate without a telephone set. VOIP is especially popular with long distance calls. The main reason for which people are so massively turning to VOIP technology is the cost. VOIP is said to be cheap, but most people use it for free. Yes, if you have a computer with a microphone and speakers, and a good Internet connection, you can communicate using VOIP for free. There are basically three ways of using VOIP. One is to have a PC on both communicating sides; another is to have a phone on one side and a PC on the other and the third is to have two phones. VOIP is a ly new technology and it has already achieved wide acceptance and use. There is still a lot to improve and it is expected to have major technological advances in VOIP in the future. It has so far proved to be a good candidate for replacing the POTS (Plain Old Telephone System). It, of course, has drawbacks along with the numerous advantages it brings; and its increasing use worldwide is creating new considerations surrounding its regulations and security. The growth of VOIP today can be compared to that of the Internet in the early 90's. The public is getting more and more conscious of the advantages they can get from VOIP at home or in their businesses. Advertising campaigns, which are present everywhere on the net, are contributing a lot towards the popularization of VOIP which not only gives facilities and allows people to save, but also producing huge income for those who dived early into the new phenomenon. The author writes the passage mainly to _ . | [
"ask readers to buy the new type of production.",
"tell us how fast the modern technology is developing.",
"introduce a new type of IP technology---VOIP.",
"teach the readers how to use VOIP."
] | null | C | |
mmlu_stem | mmlu_stem_6675 | The oddness of life in space never quite goes away. Here are some examples. First consider something as simple as sleep. Its position presents its own challenges. The main question is whether you want your arms inside or outside the sleeping bag. If you leave your arms out, they float free in zero gravity, often giving a sleeping astronaut the look of a funny balled dancer. "I'm an inside guy," Mike Hopkins says, who returned from a six-month tour on the International Space Station. "I like to be wrapped up." On the station, the ordinary becomes strange. The exercise bike for the American astronauts has no handlebars. It also has no seat. With no gravity, it's just as easy to pedal violently. You can watch a movie while you pedal by floating a microcomputer anywhere you want. But station residents have to be careful about staying in one place too long. Without gravity to help circulate air, the carbon dioxide you exhale has a tendency to form an invisible cloud around you head. You can end up with what astronauts call a carbon-dioxide headache. Leroy Chiao, 54, an American retired astronaut after four flights, describes what happens even before you float out of your seat,"Your inner ear thinks your're falling . Meanwhile your eyes are telling you you're standing straight. That can be annoying--that's why some people feel sick." Within a couple days --truly terrible days for some --astronauts' brains learn to ignore the panicky signals from the inner ear, and space sickness disappears. Space travel can be so delightful but at the same time invisibly dangerous. For instance, astronauts lose bone mass. That's why exercise is considered so vital that National Aeronautics and Space Administration (NASA) puts it right on the workday schedule. The focus on fitness is as much about science and the future as it is about keeping any individual astronauts return home, and, more importantly, how to maintain strength and fitness for the two and a half years or more that it would take to make a round-trip to Mars. The astronauts will suffer from a carbon-dioxide headache when _ . | [
"the y circle around on their bikes",
"they use microcomputers without a stop",
"they exercise in one place for a long time",
"they watch a movie while pedaling"
] | null | C |
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