problem stringlengths 14 4.09k | solution stringlengths 1 802k | task_type stringclasses 3
values | problem_tokens int64 5 895 |
|---|---|---|---|
The following is a multiple choice question (with answers).
===Question
In a spring-loaded piston-cylinder system, the cylinder contains 1.5 kg of air at 27°C and 160 kPa. It is heated using a heat source at 900 K, causing the temperature of the gas inside the cylinder to gradually rise to 900 K. At this point, the vol... | $$161. 44 kJ$$
$$
807.64kJ
$$
$$
0. 5 8 4 \mathrm{~ k J / K}
$$ | general_qa | 590 |
The following is a multiple choice question (with answers).
===Question
The most widely distributed and highest-content anions in groundwater are ____, ____ and ____
===Choices
Phosphate ion, chloride ion, fluoride ion
Nitrate ion, carbonate ion, sulfate ion
Bicarbonate ion, phosphate ion, carbonate ion
Chloride ion, ... | Chloride ion, sulfate ion, bicarbonate ion | general_qa | 147 |
The following is a multiple choice question (with answers).
===Question
21 year old female presents with history of mild bilateral ptosis, proximal muscle weakness and easy fatiguability which among the following is best in diagnosing this condition -
===Choices
Intravenous neostigmine test
Intramuscular edrophonium c... | Edrophonium test | general_qa | 130 |
The following is a multiple choice question (with answers).
===Question
An electric dipole is placed at the origin O such that its equator is y-axis. At a point P far away from dipole, the electric field direction is along y-direction. OP makes an angle $\alpha $ with the x-axis such that :
===Choices
$$ tan \alpha =1... | $$ tan \alpha =\sqrt{3}$$ | general_qa | 183 |
The following is a multiple choice question (with answers).
===Question
When a polyatomic gas undergoes an adiabatic process, its temperature and volume are related by the equation $TV^n=$ constant, the value of n will be?
===Choices
1.44
1.25
$$1$$
$$1.33$$
1.40
1.20
$$2.33$$
$$0.33$$
1.50
1.67 | $$1.33$$ | general_qa | 107 |
The following is a multiple choice question (with answers).
===Question
A particle with mass $1 g$ moves in a straight line under the action of an external force, which is directly proportional to time and inversely proportional to the velocity of the particle. When $t=1 0 s$, the velocity is equal to $5 0 \mathrm{c m}... | $$\sqrt{6 8 8 5 0 0} \mathrm{c m / s}.$$ | general_qa | 377 |
The following is a multiple choice question (with answers).
===Question
In 1947, the Chinese Communist Party held a national land conference in Pingshan County, Hebei Province, and the programmatic document that openly abolished the feudal and semi-feudal land system was ( )
===Choices
The Instructions on Liquidation,... | The Chinese Land Law Outline | general_qa | 134 |
The following is a multiple choice question (with answers).
===Question
Given a charged body with a radius of $a$ and a volume charge density $\rho = \rho_{0} [ 1 - ( R^{2} / a^{2} )]$, it is surrounded by a concentric conducting spherical shell with an inner radius of $b$ ($b > a$) and an outer radius of $c$. Find the... | $$
V_{3} ( R )=\frac{2 \rho_{0} a^{3}} {1 5 \varepsilon_{0} R^2}a_R
$$ | general_qa | 515 |
The following is a multiple choice question (with answers).
===Question
In 1810, François Aimé Louis Dumoulin published a collection of how many engravings themed on the journey of "Robinson Crusoe"?
===Choices
150
148
152
145
149
151
154
147
155
153 | 150 | general_qa | 90 |
The following is a multiple choice question (with answers).
===Question
What city did Ciara perform in during her Beauty Marks Tour on September 24, 2019?
===Choices
Corpus Christi
Austin
Galveston
Beaumont
Dallas
El Paso
Houston
San Antonio
Fort Worth | Houston | general_qa | 68 |
The following is a multiple choice question (with answers).
===Question
In the fig (Ficus) plant's syconium, which of the following can produce fruit?
===Choices
Clustered flowers
Composite flowers
Perfect flowers
Naked flowers
Unisexual flowers
Male flowers
Short-style flowers
Long-style flowers
Aborted flowers
Femal... | Long-style flowers | general_qa | 74 |
The following is a multiple choice question (with answers).
===Question
Cold-soaked field refers to a kind of paddy field which is impregnated by cold water, cold spring or groundwater in lake area. It has _____ , poor drainage, poor soil ventilation and water permeability. Spring soil temperature rise slowly, seedling... | deep gley layer; water conservancy; ridge beds | general_qa | 274 |
The following is a multiple choice question (with answers).
===Question
Which of the following is the shape of graphite distributed on the matrix of steel in malleable cast iron?
===Choices
Spherical shape
Irregular granules
Flocculent mass
Compact clusters
Coarse flake
Thin plate-like shape
Elongated strands
Fibrous ... | Flocculent mass | general_qa | 81 |
The following is a multiple choice question (with answers).
===Question
In the International Dental Federation system, the right mandibular primary central incisor can be represented as which of the following serial numbers?
===Choices
61
31
81
41
42
91
72
51
71
32 | 81 | general_qa | 73 |
The following is a multiple choice question (with answers).
===Question
In the various physiological functions governed by the liver's regulation, the most fundamental is _______.
===Choices
Transformation of food into energy
Storage of vitamins and minerals
Production of digestive enzymes
Coordination of muscle movem... | Smoothing the flow of qi | general_qa | 106 |
The following is a multiple choice question (with answers).
===Question
Which Salvador Dalí painting was described as "a vast human body breaking out into monstrous excrescences of arms and legs tearing at one another in a delirium of auto-strangulation"?
===Choices
Soft Construction with Boiling Beans (1937)
Soft Con... | Soft Construction with Boiled Beans | general_qa | 147 |
The following is a multiple choice question (with answers).
===Question
Light converged by a cylindrical lens illuminates on a stripe-shaped semiconductor pn junction. It is known that at room temperature, the resistivity of the n-region is $40 \ \Omega \cdot \text{cm}$, the resistivity of the p-region is $0.1 \ \Omega... | $$
2 3. 1 ( \mathrm{l x} )
$$ | general_qa | 490 |
The following is a multiple choice question (with answers).
===Question
What does neotectonic movement mean?
===Choices
Plate movements from the dawn of the Paleozoic to the present.
Terrain alterations from the initiation of the Permian to modern times.
Plate dynamics from the onset of the Cretaceous to today.
Tecton... | Tectonic movement from the beginning of the Tertiary to the present. | general_qa | 165 |
The following is a multiple choice question (with answers).
===Question
In a gas cylinder with a volume of 1.77 m³, there was originally a certain amount of CO with an absolute pressure of 103.4 kPa at a temperature of 21°C. Later, 1.36 kg of CO was pumped in, and the temperature after the input was measured at 24°C. W... | 172kPa | general_qa | 160 |
The following is a multiple choice question (with answers).
===Question
In chronic respiratory acidosis, which of the following cannot play a compensatory role?
===Choices
Heart
Lung
Plasma bicarbonate buffer system
Intracellular and extracellular ion exchange
Plasma protein buffer system
Liver
Kidney
Hemoglobin buffe... | Lung | general_qa | 71 |
The following is a multiple choice question (with answers).
===Question
The "Twelfth Five-Year Plan" report identifies agricultural issues, energy and transportation issues, and ________ issues as the three main focuses of economic development.
===Choices
natural disasters
tourism development
educational science
techn... | educational science | general_qa | 84 |
The following is a multiple choice question (with answers).
===Question
The rate of reaction is expressed in different ways as follows:
$$+\dfrac{1}{2} \dfrac{d[C]}{dt} = -\dfrac{1}{3} \dfrac{d[D]}{dt} = +\dfrac{1}{4} \dfrac{d[A]}{dt} = -\dfrac{d[B]}{dt}$$
The reaction is:
===Choices
B + 3D \longrightarrow 3A + 2C
$$B... | $$B + 3D \longrightarrow 4A + 2C$$ | general_qa | 252 |
The following is a multiple choice question (with answers).
===Question
The method of using silicon and aluminum as reducing agents to reduce oxides to produce low carbon alloys or pure metals is called ______ .
===Choices
reactive metal processing
metal thermal reduction
metallic oxide reduction
binary reducer applic... | metal thermal reduction | general_qa | 94 |
The following is a multiple choice question (with answers).
===Question
The coefficient of the (x - 8)2 term in the Taylor polynomial for y = x2/3 around x = 8 is
===Choices
1/72
-1/72
-1/6
0
1/3
1/6
-2/3
2/3
1/144
-1/144 | -1/144 | general_qa | 94 |
The following is a multiple choice question (with answers).
===Question
An ophthalmologist prescribed +2.0D glasses for person A and -4.0D glasses for person B. What are the distances of the far point for the nearsighted eye and the near point for the farsighted eye?
===Choices
1.0m,0.5m
0.5m,0.25m
0.4m,0.25m
2.0m,0.5... | 0.5m,0.25m | general_qa | 171 |
The following is a multiple choice question (with answers).
===Question
A block of mass M = 5kg is moving on a horizontal plane. An object of mass m = 1 kg is dropped onto the block, hitting it with a vertical velocity of $v_1$ 10 m/s. The speed of the block at the same instant is $v_ 2$ = 2 m/s on the floor. The colli... | 1.4 m/s | general_qa | 201 |
The following is a multiple choice question (with answers).
===Question
What is the main role of the free hand when conducting an ensemble?
===Choices
Musical reinforcement
Balance
Following the score
Keeping the beat | Musical reinforcement | general_qa | 44 |
The following is a multiple choice question (with answers).
===Question
The value of $\left( \frac{1+\sqrt{3} \; \mathrm{i}} {1-\sqrt{3} \; \mathrm{i}} \right)^{10}$ is ().
===Choices
$$
\frac{1}{2}+\frac{\sqrt{3}}{2} \mathrm{i}
$$
$$
-\sqrt{3}+i
$$
$$
\frac{1}{2}-\frac{\sqrt{3}}{2} \mathrm{i}
$$
$$
\sqrt{3}-1
$$
$$
\... | $$
-\frac{1} {2}+\frac{\sqrt{3}} {2} \mathrm{i}
$$ | general_qa | 273 |
The following is a multiple choice question (with answers).
===Question
Which Illinois university did artist Herbert House graduate from?
===Choices
Illinois State University.
Illinois Wesleyan University.
Illinois Institute of Technology.
Northern Illinois University.
University of Illinois at Springfield.
University... | Illinois State University. | general_qa | 81 |
The following is a multiple choice question (with answers).
===Question
If a woman has a history of disease, persistent leakage during pregnancy, dark purple blood, dark purple tongue or petechiae, and a heavy and astringent pulse, what should be the first choice for treatment?
===Choices
Longdan draft
Weijing decocti... | Shenghua soup | general_qa | 110 |
The following is a multiple choice question (with answers).
===Question
Air flows out from a large container through a converging-diverging nozzle with a throat diameter of 2.0 inches. The internal pressure of the tank is 50 psia, and the temperature is $80^{\circ} \mathrm{F}$. The external pressure is 13.5 psia. If th... | $$
0. 0 2 5 7 {\mathrm{f t}}^{2}
$$ | general_qa | 352 |
The following is a multiple choice question (with answers).
===Question
In fermentation bed breeding, what is mixed with straw, sawdust, rice husks, and auxiliary materials in a certain proportion and fermented to form organic bedding?
===Choices
Animal manure
Fermentation starter cultures
Legume cover crops
Non-organ... | Fermentation starter cultures | general_qa | 95 |
The following is a multiple choice question (with answers).
===Question
What month and year did the Large Hadron Collider reopen after it closed for maintenance and further upgrades at the end of 2018?
===Choices
June 2022
February 2022
July 2022
September 2022
March 2022
April 2022
November 2022
October 2022
August 2... | April 2022 | general_qa | 115 |
The following is a multiple choice question (with answers).
===Question
He-Ne laser discharge tube pressure $\mathbf{p}=270 \mathbf{P} \mathbf{a}$, with upper and lower energy level lifetimes of $\tau_{3}=2 \times 10^{-8} \mathrm{s}$ and $\tau_{2}=2 \times 10^{-8} \mathrm{s}$, respectively. Find: ① the Doppler linewidt... | $$
1 3 0 0 M H z
$$
$$
2 1 0. 5 M H z
$$
$$
0. 3 w / m m^{2}
$$ | general_qa | 668 |
The following is a multiple choice question (with answers).
===Question
What is the mixed salivary gland that is primarily composed of serous acini?
===Choices
Buccal gland
Von Ebner's gland
Parotid gland
Labial gland
Lingual gland
Submandibular gland
Molar gland
Chin gland
Palatine gland
Sublingual gland | Submandibular gland | general_qa | 84 |
The following is a multiple choice question (with answers).
===Question
An abattoir worker presented with a malignant pustule on his hand that progressed to form an ulcer. Smear was taken from the ulcer and sent to laboratory for investigation. The diagnosis is:
===Choices
Malignant pustule (variant of cutaneous tular... | Cutaneous anthrax | general_qa | 152 |
The following is a multiple choice question (with answers).
===Question
On which day, month, and year did Anna Catharina Bischoff die?
===Choices
August 30, 1787
August 30, 1786
August 30, 1785
August 30, 1783
August 30, 1782
August 30, 1788
August 30, 1781
August 30, 1789
August 30, 1784
August 30, 1780 | August 30, 1787 | general_qa | 144 |
The following is a multiple choice question (with answers).
===Question
Becker's representative work is ().
===Choices
"Economic Analysis of the Family"
"The Industrial Revolution and Families"
"The Sociology of Market Behavior"
"Investment in Human Capital"
"The Exploitation of the Works of Nature"
"Economic Policy a... | "Economic Analysis of the Family" | general_qa | 99 |
The following is a multiple choice question (with answers).
===Question
A retaining wall has no displacement under the action of the soil behind the wall, and the fill in front of the wall is in elastic equilibrium, what is the earth pressure on the wall at this time?
===Choices
Balanced earth force
Static earth press... | Static earth pressure | general_qa | 101 |
The following is a multiple choice question (with answers).
===Question
If, under the current climate conditions, the height of a flood defense designed for a 50-year flood is 10 meters, then under future climate change conditions, what level of flood is a 10-meter high flood defense most likely designed for?
===Choic... | 20-year flood | general_qa | 121 |
The following is a multiple choice question (with answers).
===Question
What is the most severe complication of spinal cord injury?
===Choices
Reflex Sympathetic Dystrophy
Intervertebral Disc Degeneration
Post-Traumatic Stress Disorder
Central Cord Syndrome
Neurogenic Bladder Dysfunction
Deep Vein Thrombosis
Autonomic... | Autonomic Hyperreflexia | general_qa | 95 |
The following is a multiple choice question (with answers).
===Question
In large fermentation factories, most of the culture medium sterilization using short time, high efficiency of continuous pressurized steam sterilization method can be mastered in ( ) temperature maintained at 5 ~ 15s.
===Choices
110~115°C
160~165... | 135~140°C | general_qa | 137 |
The following is a multiple choice question (with answers).
===Question
At what frequency does a 0.01 m diameter aluminum rod have equal phase velocities for transverse and longitudinal vibrations?
===Choices
$$
f=2. 4 8 \times1 0^{6} \mathrm{~ H z}
$$
$$
f=6. 8 2 \times1 0^{4} \mathrm{~ H z}
$$
$$
f=9. 9 4 \times1 0^... | $$
f=3. 2 5 \times1 0^{5} \mathrm{~ H z}
$$ | general_qa | 311 |
The following is a multiple choice question (with answers).
===Question
______are proteins synthesized by living cells that catalyze specific substrates with high efficiency.
===Choices
Vitamins
Cytokines
Antibodies
Hormones
Nucleotides
Lipids
Enzymes
Carbohydrates
Amino acids
Receptors | Enzymes | general_qa | 76 |
The following is a multiple choice question (with answers).
===Question
What is the official full Chinese name for the mine called 'adoop ata' in Russia?
===Choices
MS-3 Anti-Personnel Explosive
MS-3 Anti-Tank Mine
MS-3 Anti-Infantry Mine
MS-3 Anti-Personnel Device
MS-3 Anti-Personnel Trap
MS-3 Anti-Hostile Mine
MS-3 ... | MS-3 Anti-Personnel Mine | general_qa | 121 |
The following is a multiple choice question (with answers).
===Question
Construct a complete truth table for the following pairs of propositions. Then, using the truth tables, determine whether the statements are logically equivalent or contradictory. If neither, determine whether they are consistent or inconsistent. J... | Logically equivalent | general_qa | 134 |
The following is a multiple choice question (with answers).
===Question
Which parasite has the greatest impact on milk production in dairy cows?
===Choices
Hookworms
Fasciolosis
Giardia
Liver flukes
Cryptosporidium
Ectoparasites
Trichinosis
Trypanosomes
Nematodes
Coccidia | Nematodes | general_qa | 75 |
The following is a multiple choice question (with answers).
===Question
What is the main purpose of adding urea to cattle feed?
===Choices
Boost mineral absorption
Promote weight gain
Increase energy supply
Enhance milk production
Enhance rumen efficiency
Increase protein content
Increase fiber content
Improve feed pr... | Increase protein content | general_qa | 77 |
The following is a multiple choice question (with answers).
===Question
Within a diameter range of approximately 50m, the exhaust outlet for radioactive gases should be how many meters higher than the tallest building?
===Choices
5m
1m
6m
3m
10m
4m
20m
8m
2m
7m | 3m | general_qa | 76 |
The following is a multiple choice question (with answers).
===Question
What's the first and last name of the linguist who wrote the paper "Pre- and postnominal onymic genitives in (Early) New High German: A multifactorial analysis"?
===Choices
Tanya Ackermanne
Tanja Ackermanne
Tanya Ackermann
Tanya Ackermannn
Tanja A... | Tanja Ackermann | general_qa | 113 |
The following is a multiple choice question (with answers).
===Question
HBase maintains a multi-level index for each value. What are the following components?
===Choices
<key, column family, timestamp, column qualifier>
<row key, column family, column qualifier, timestamp>
<timestamp, column family, column qualifier, ... | <key, column family, column name, timestamp> | general_qa | 150 |
The following is a multiple choice question (with answers).
===Question
Find the integral curve is ____ of $y^{\prime\prime}=x$, which passes through the point $M(0,1)$ and is tangent to the line $y=\frac{x}{2}+1$ at this point.
===Choices
$$y=\frac{1} {8} x^{3}+\frac{1} {2} x+1$$
$$y=\frac{1} {6} x^{3}+x+2$$
$$y=\fra... | $$y=\frac{1} {6} x^{3}+\frac{1} {2} x+1$$ | general_qa | 316 |
The following is a multiple choice question (with answers).
===Question
Natural convection of water, forced convection of air and boiling of oil, which of these three cases has the lowest value of convective heat transfer coefficient?
===Choices
Natural convection of oil
Forced convection of helium
Boiling of water
Na... | Forced convection of air | general_qa | 107 |
The following is a multiple choice question (with answers).
===Question
Auger boring is most suitable for __ type of work.
===Choices
Pipe installations
Highway exploration
Dam construction
Coastal piers
Buildings
Agricultural irrigation
Skyscraper foundations
Urban tunnels
Air field pavement
Mountain railways | Highway exploration | general_qa | 67 |
The following is a multiple choice question (with answers).
===Question
A steel rod of length L = 20 cm and cross-sectional area A = 3 cm^2 is heated at one end to T_1 = 300°k while the other end rests in ice. Assuming that heat transmission occurs exclusively through the rod (without losses from the walls), calculate ... | 4.86 gr | general_qa | 172 |
The following is a multiple choice question (with answers).
===Question
Excavation of Yang-shao sites in China indicates which domesticated crops?
===Choices
maize, cabbage, and peas.
soybeans, emmer, and rice.
barley, lentils, and peas.
millet, barley, and maize.
sorghum, emmer, and legumes.
rice, soybeans, and maize... | millet, cabbage, and rice. | general_qa | 119 |
The following is a multiple choice question (with answers).
===Question
With the input quantity remaining constant, if the introduction of feedback causes ( ), it indicates that the feedback introduced is negative feedback.
===Choices
The output power decreases
The output quantity increases
The net input quantity decr... | The net input quantity decreases | general_qa | 94 |
The following is a multiple choice question (with answers).
===Question
What is usually provided by the market and government departments in cooperation?
===Choices
Foreign goods
Public goods
Luxury goods
Social goods
Mixed goods
Common goods
Merchandise goods
Private goods
Necessity goods
Domestic goods | Mixed goods | general_qa | 65 |
The following is a multiple choice question (with answers).
===Question
A three-point transverse bending test is conducted on a cylindrical speciman of aluminum oxide having a reported flexural strength of 300 MPa (43,500 psi). If the specimen radius is 5.0 mm (0.20 in.) and the support point separation distance is 15.... | $$
2. 8 6. 5 \ \mathrm{M P a} \ \ ( 4 0, 3 0 0 \ \mathrm{p s i} )
$$ | general_qa | 564 |
The following is a multiple choice question (with answers).
===Question
The generation of oil and gas is controlled by two factors, temperature and time, the effect of temperature on the rate of oil generation is (), the effect of time is (); temperature and time have ().
===Choices
Exponential increase, linear decrea... | Exponential relationship, linear relationship, complementarity | general_qa | 139 |
The following is a multiple choice question (with answers).
===Question
Calculate the work done by the system in an irreversible (single step) adiabatic expansion of $2$ mole of a polyatomic gas $(\gamma =4/3)$ from $300\ K$ and pressure $10$ atm to $1$ atm:
===Choices
-325R
-352R
-210R
-305R
-235R
-252R
$$-205R$$
$$-... | $$-405R$$ | general_qa | 138 |
The following is a multiple choice question (with answers).
===Question
$int_{{}}^{{}}{frac{2{{x}^{2}}+2x+13}{(x-2){{({{x}^{2}}+1)}^{2}}}dx}=$
===Choices
$frac{1}{2}cdot frac{3-4x}{{{x}^{2}}+1}+frac{1}{2}ln frac{{{(x-2)}^{2}}}{{{x}^{2}}+1}-3arctan x+C$
$frac{1}{2}cdot frac{3-4x}{{{x}^{2}}+1}-frac{1}{2}ln frac{{{(x-2)}... | $frac{1}{2}cdot frac{3-4x}{{{x}^{2}}+1}+frac{1}{2}ln frac{{{(x-2)}^{2}}}{{{x}^{2}}+1}-4arctan x+C$ | general_qa | 641 |
The following is a multiple choice question (with answers).
===Question
From the perspective of the methods adopted by decision-makers, administrative decisions can be categorized as empirical decisions and what other type?
===Choices
Scientific Decision-Making
Systematic Decision-Making
Collective Decision-Making
Int... | Scientific Decision-Making | general_qa | 98 |
The following is a multiple choice question (with answers).
===Question
The modulus of elasticity for titanium carbide (TiC) having 5 vol% porosity is 310 GPa ($45 \times1 0^{6}$
psi).
The modulus of elasticity for the nonporous material is ( ).
===Choices
$$
2 8 3 \ \mathrm{G P a} \ \ \left( 4 1. 0 \times1 0^{6} \ \m... | $$
3 4 2 \ \mathrm{G P a} \ \ \left( 4 9. 6 \times1 0^{6} \ \mathrm{p s i} \right)
$$ | general_qa | 549 |
The following is a multiple choice question (with answers).
===Question
The Magellanic Stream orbits the Milky Way and extends from 50 kpc to 100 kpc from the Galactic center.
Consider a clump of gas in the stream in a circular orbit about the Galactic center. Take the radius of the orbit to be 75 kpc and the orbital s... | $$
M / L_{B}=4 5 \, \mathrm{M}_{\odot} / L_{\odot}
$$ | general_qa | 438 |
The following is a multiple choice question (with answers).
===Question
From a legal perspective, what issues might arise if the IT department decides to monitor internet traffic for all employees due to a slowdown in normal network operations?
===Choices
Not informing the employees that they are going to be monitored... | Not informing the employees that they are going to be monitored could be an invasion of privacy. | general_qa | 220 |
The following is a multiple choice question (with answers).
===Question
Under what pressure conditions is $Cu{ SO }_{ 4 }.5{ H }_{ 2 }O$ efflorescent at 25C? How good a drying agent is $Cu{ SO }_{ 4 }.3{ H }_{ 2 }O$ at the same temperature? Given
$$Cu{ SO }_{ 4 }.5{ H }_{ 2 }O(s)\rightleftharpoons Cu{ SO }_{ 4 }.3{ H }... | $Cu{ SO }_{ 4 }.5{ H }_{ 2 }O(s)$ will not act as efflorescent but on the contrary $Cu{ SO }_{ 4 }.3{ H }_{ 2 }O$ will absorb moisture from the atmosphere under given conditions. | general_qa | 786 |
The following is a multiple choice question (with answers).
===Question
To prepare a solution with pH = 4.0 and pZn = 7.9, the ratio [n(Y):n(Zn)] of the amount of EDTA to Zn2+ required is ( ). [lgK(ZnY)=7.9 at pH 4.0 is known].
===Choices
1:2
2:3
1:4
3:1
3:2
5:1
1:3
4:1
2:1
1:1 | 2:1 | general_qa | 121 |
The following is a multiple choice question (with answers).
===Question
Flukes (trematodes), which belong to parasitic flatworms, exhibit a parasitic lifestyle, and many species have complex life cycles requiring more than two hosts. Which of the flukes have a life cycle that involves more than two hosts?
===Choices
C... | Clonorchis sinensis, Schistosoma japonicum, Fasciola hepatica | general_qa | 271 |
The following is a multiple choice question (with answers).
===Question
Determine the heat of the following reaction:
$$FeO(s)+{ Fe }_{ 2 }{ O }_{ 3 }(s)\longrightarrow { Fe }_{ 3 }{ O }_{ 4 }(s)\quad $$
Given informations:
$$2Fe(s)+{ O }_{ 2 }(g)\longrightarrow 2FeO(s);\quad \Delta { H }^{ o }=-544kJ$$
$$4Fe(s)+3{ O }... | $$-22.2kJ$$ | general_qa | 291 |
The following is a multiple choice question (with answers).
===Question
Which library, established by Philip V in 1712, was the predecessor of the National Library of Spain?
===Choices
Royal Library of Madrid
National Library of Spain
National Library of Madrid
Royal Library of Philip IV
Royal Library of Philip V
Roya... | Royal Library | general_qa | 93 |
The following is a multiple choice question (with answers).
===Question
Which of the following measures improves the insulation level of an air gap?
===Choices
Elevate the air temperature
Enhance the gap scale
Increase the gap width
Inflate the gap size
Expand the gap volume
Compress the air inside
Decrease the air de... | Increase the gap width | general_qa | 87 |
The following is a multiple choice question (with answers).
===Question
About how many meters has the North Atlantic increased in width in the last 200 years?
===Choices
20m
30m
10m
25m
8m
15m
100m
1m
1000m
5m | 10m | general_qa | 76 |
The following is a multiple choice question (with answers).
===Question
A simple pendulum of length L and mass M is oscillating in a plane about a vertical line between angular limits -$\phi$ and +$\phi$. For an angular displacement, $\theta$(|$\theta$| < $\phi$) the tension in the string and velocity of the bob are T ... | T = Mg (3 cos $\theta$ - 2 cos $\phi$) | general_qa | 227 |
The following is a multiple choice question (with answers).
===Question
Group A PCM base includes ____ time slots, transmitting ___ voice signals. Each signal is multiplexed according to ____.
===Choices
32, 30, the concept of Frequency Division Multiplexing (FDM)
30, 28, the principle of Frequency Division Multiplexi... | 32, 30, the principle of Time Division Multiplexing (TDM) | general_qa | 231 |
The following is a multiple choice question (with answers).
===Question
The ambiguity in interpreting art arises from().
===Choices
Aesthetic unity
Visual composition
Language use
Cultural context
Subjective perspective
Emotional impact
Artistic intention
clear definitions
Social commentary
Universal standard | Language use | general_qa | 60 |
The following is a multiple choice question (with answers).
===Question
"Man cannot fully grasp = reflect = depict the entire nature, its 'immediate totality'; man can only approach this goal forever by creating abstractions, concepts, laws, scientific world pictures, etc." This indicates
===Choices
Man can only recog... | Any truth can only be an approximately correct, i.e., relatively correct, reflection of the subjective on the objective reality. | general_qa | 260 |
The following is a multiple choice question (with answers).
===Question
Glutamate Dehydrogenase Catalyzed Reaction:
Glutamate $+ \mathbf{NAD}^{+} + \mathbf{H}_{2}O ⇄ \alpha$-ketoglutarate $+ NADH$
$$+ \mathbf{NH}_{4}^{+} + \mathbf{H}^{+}$$
The initial concentrations of glutamate and $NAD^{+}$ are $20 \, \text{mM}$ and ... | $$
4. 0 5 \times1 0^{-1 5} \; M
$$ | general_qa | 437 |
The following is a multiple choice question (with answers).
===Question
The basic conditions for the formation of refracted waves are that the incident angle is equal to the critical angle, and the wave speeds of the two media are unequal, with the lower part being greater than the upper part; what are the basic condit... | The two media have a difference in wave impedance | general_qa | 328 |
The following is a multiple choice question (with answers).
===Question
When both upper limbs stand naturally vertically, what does the lower angle of the shoulder blade correspond to?
===Choices
the sixth intercostal space
the fifth intercostal space
the fourth intercostal space
the seventh intercostal space
the tent... | the seventh intercostal space | general_qa | 101 |
The following is a multiple choice question (with answers).
===Question
If there are two infinitely long straight current-carrying wires and the magnetic field distribution in space does not have simple symmetry, this magnetic field distribution ( ).
===Choices
Can be calculated using both Ampere's circuital theorem a... | Can be calculated using both Ampere's circuital theorem and the principle of superposition of magnetic field intensities | general_qa | 201 |
The following is a multiple choice question (with answers).
===Question
Bagassosis occurs with:
===Choices
Cotton
Beet fibres
Silica fibres
Sugarcane dust
Barley dust
Hay dust
Sugarcane fibres
Wood dust
Carbon paicles
Sugarcane particles | Sugarcane fibres | general_qa | 68 |
The following is a multiple choice question (with answers).
===Question
Suppose you wanted to use a real-life visible light laser as a lightsaber from Star Wars to dapperly swordfight with your opponent, how might you run into problems?
===Choices
The laser might not be visible at all times without the aid of colored ... | Once the laser light is shot it extends all the way out into the distance and does not turn into a fixed length blade. | general_qa | 226 |
The following is a multiple choice question (with answers).
===Question
"To be valid, the minor premise must either agree with the antecedent, or disagree with the consequent" is a requirement for
===Choices
a hypothetical syllogism
a distributive syllogism
a categorical syllogism
a conditional syllogism
a categorical... | a conditional syllogism | general_qa | 121 |
The following is a multiple choice question (with answers).
===Question
How long would it take a current of 10 amperes to put a layer of copper 0.1 mm thick on both sides of a rectangular plate of 10 cm x 1 x 65 cm (e.c.e. of copper = 0 x 00033 gm/coul, density of Copper = 9 gin/cc)?
===Choices
450 sec
900 sec
9 min
4... | 450 sec | general_qa | 146 |
The following is a multiple choice question (with answers).
===Question
An electron in a hydrogen like species is in the excited state $n_2$. The wavelength for the transition $n_2$ to $n_1=2$ is $48.24nm$. The corresponding wavelength for the transition from $n_2$ to $n_1=3$ is $142.46nm$. Find the value of $n_2$ and ... | $$n_2=7, Z=3$$ | general_qa | 224 |
The following is a multiple choice question (with answers).
===Question
What is the occurrence form of elements?
===Choices
The state of an element throughout a specific phase in a natural chain or its evolutionary history, and its fusion connections with allied elements.
The period of an element throughout a specific... | The state of an element at a certain stage in a natural process or its evolutionary history, and its combination relationship with symbiotic elements. | general_qa | 295 |
The following is a multiple choice question (with answers).
===Question
Suppose that $f$ is a function from $\mathbb{R}$ to $\mathbb{R}$ such that \[ f(x) + f\left( 1 - \frac{1}{x} \right) = \arctan x \] for all real $x \neq 0$. (As usual, $y = \arctan x$ means $-\pi/2 < y < \pi/2$ and $\tan y = x$.) Find \[ \int_0^1 f... | \frac{3\pi}{8} | general_qa | 189 |
The following is a multiple choice question (with answers).
===Question
What does a smaller aperture value of a camera lens mean?
===Choices
Reduced Shutter Speed
Lower Light Sensitivity
Greater Image Stabilization
Lower Chromatic Aberration
Higher Focal Length
Higher Luminous Flux
Wider Angle of View
Increased Depth ... | Higher Luminous Flux | general_qa | 83 |
The following is a multiple choice question (with answers).
===Question
In the Compton scattering experiment, when the wavelength of the incident light is 0.050 nm X-rays and 500 nm visible light, what is the maximum energy acquired by the recoil electrons?
===Choices
$$
E_{k_{1}}=2. 6 \mathrm{k e V},
$$
$$
E_{k_{2}}=... | $$
E_{k_{1}}=2. 2 \mathrm{k e V},
$$
$$
E_{k_{2}}=2. 4 \, \times\, 1 0^{-5} \mathrm{e V}
$$ | general_qa | 610 |
The following is a multiple choice question (with answers).
===Question
The natural frequency of a one-degree-of-freedom mechanical vibration system is 15 $\mathbf{k} \mathbf{Hz}$, with a mass of $0.1 \ g$. If the effective value of the external force applied to the system is 100 dyne, what is the amplitude of the vibr... | $$
u_{\mathrm{m}} \ =\ 1 0^{-4} \ \mathrm{m / s_{}}
$$ | general_qa | 404 |
The following is a multiple choice question (with answers).
===Question
Find the mass fraction of hydrogen in bearing steel with the following composition: $w [ \text{C} ] = 1.05\%$, $w [ \text{Si} ] = 0.6\%$, $w [ \text{Mn} ] = 1.0\%$, $w [ \mathbf{P} ] = 0.02\%$, $w [ \text{S} ] = 0.02\%$ under an atmosphere containi... | $$
7. 5 8 \times1 0^{-5} \%
$$ | general_qa | 347 |
The following is a multiple choice question (with answers).
===Question
Which of the following additives can improve the digestive efficiency of ruminants?
===Choices
Essential oils
Organic minerals
Acidifiers
Antioxidants
Probiotics strains
Enzyme preparations
Microbial cultures
Pellet binders
Herbal extracts
Ionopho... | Enzyme preparations | general_qa | 74 |
The following is a multiple choice question (with answers).
===Question
Determine 0.1 mol/L $\mathrm{Cl}^{-}$ using the ferric ammonium alum indicator method. In the presence of $\mathrm{AgCl}$ precipitate, titrate back the excess 0.1 mol/L $\mathrm{AgNO_{3}}$ with a 0.1 mol/L $\mathrm{KSCN}$ standard solution. The fin... | $0.23ml$ | general_qa | 288 |
The following is a multiple choice question (with answers).
===Question
A cycle starts from rest with acceleration $2m/{s}^{2}$ for time ${t}_{0}$ sec after which brakes are applied. Cycle decelerates at a constant rate $10m/{sec}^{2}$ and comes to rest at $C$. If total time taken is $12sec$ thenThen choose the correct... | distance AC covered by cycle is $120m$ and ${t}_{0}=5sec$ | general_qa | 284 |
The following is a multiple choice question (with answers).
===Question
Try to calculate and explain at what temperature the transition from extrinsic diffusion to intrinsic diffusion occurs in an MgO crystal containing $8 \times 10^{-9}$ of $\mathrm{Al_2O_3}$ impurities. If we want $\mathrm{Mg}^{2+}$ diffusion in MgO ... | $835.77K,9.09\times10^{-6}$ | general_qa | 407 |
The following is a multiple choice question (with answers).
===Question
What is the temperature range that normal dental pulp can tolerate?
===Choices
30-45°C
35-60°C
25-40°C
40-55°C
15-30°C
5-15°C
20-50°C
10-20°C
18-28°C
22-35°C | 20-50°C | general_qa | 97 |
The following is a multiple choice question (with answers).
===Question
Rocks rich in felsic composition (Al,SiO₄ aluminosilicate) formed the Al₂SiO₅ series of polymorphic minerals with gradual increase in temperature and pressure during metamorphism. In what order?
===Choices
Andalusite, andalusite, siliconite
Andalu... | Andalusite, kyanite, siliconite | general_qa | 178 |
The following is a multiple choice question (with answers).
===Question
Given positive integers $y$, define the sequence $z(y)$ by the following rules: $z(1) = 1$, $z(2y) = z(y)$, and $z(2y+1) = (-1)^y z(y)$. Find the value of \[ \sum_{y=1}^{4727} z(y) z(y+2). \]
===Choices
-5
-4
-3
0
2
-1
-7
-2
-6
1 | -1 | general_qa | 128 |
The following is a multiple choice question (with answers).
===Question
Which of the following is not a histological type of lung cancer ( ).
===Choices
large cell carcinoma
squamous cell carcinoma
small cell carcinoma
adenocarcinoma
papillary cell carcinoma
clear cell carcinoma | clear cell carcinoma | general_qa | 60 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.