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
The total mass of a rear-wheel-drive vehicle is $2152 \, \text{kg}$. The front axle load is 52%, and the rear axle load is 48%. The main transmission ratio is $i_{O} = 4.55$. The transmission ratios for the gears are as follows: first gear: 3.79; b... | $$
= 1 6. 4 1^{\circ}
$$ | general_qa | 639 |
The following is a multiple choice question (with answers).
===Question
Who is the author of the book 'Chang Wu Zhi'?
===Choices
Ji Cheng
Zhang Dai
Shen Fu
Gu Yanwu
Yuan Hongdao
Ji Yun
Tang Xianzu
Li Yu
Feng Menglong
Wen Zhenheng | Wen Zhenheng | general_qa | 77 |
The following is a multiple choice question (with answers).
===Question
The first film that Chen Qiang and Chen Peisi collaborated on was ____.
===Choices
"Family Ties"
"Our Happy Days"
"Look at This Family"
"Him and Her"
"Sweet Business"
"A Day in the Life"
"The Great Adventure"
"Journey Together"
"The Big Reunion"
"... | "Look at This Family" | general_qa | 85 |
The following is a multiple choice question (with answers).
===Question
Which of the following statements about zygodactyl feet in bird classification is correct?
===Choices
Zygodactyl feet refer to the second and fourth toes of a bird pointing forward, while the first and third toes point backward.
Zygodactyly refers... | Zygodactyl feet refer to the second and third toes of a bird pointing forward, while the first and fourth toes point backward. | general_qa | 302 |
The following is a multiple choice question (with answers).
===Question
A block is suspended by n ideal spring constant K. If the block is pulled down by constant force F and if maximum displacement of block from it's equilibrium position is z. then
===Choices
$$ z = \dfrac{ F }{ 2K } $$
work done by force F is equal ... | $$z=\dfrac { F }{ K } $$ | general_qa | 222 |
The following is a multiple choice question (with answers).
===Question
The time period of oscillation of an object whose displacement varies with time $y= sin \ w t + sin \ 3 w t$ is:
===Choices
$$\cfrac {3\pi}{w}$$
$$\cfrac {\pi}{w}$$
$$\cfrac {5\pi}{w}$$
$$\cfrac {4\pi}{3w}$$
$$\cfrac {5\pi}{2w}$$
$$\cfrac {\pi}{2w... | $$\cfrac {2\pi}{w}$$ | general_qa | 178 |
The following is a multiple choice question (with answers).
===Question
Birth weight doubles by?
===Choices
10 months
9 months
4 months
8 months
5 months
3 months
7 months
12 months
6 months
11 months | 5 months | general_qa | 54 |
The following is a multiple choice question (with answers).
===Question
What does the primary ray in the stem refer to?
===Choices
Pith ray
Vascular ray
Bundle ray
Cortical ray
Medullary ray
Lateral ray
Peripheral ray
Parenchyma ray
Cambial ray
Axial ray | Medullary ray | general_qa | 69 |
The following is a multiple choice question (with answers).
===Question
A particle suspended from a vertical spring oscillates $10$ times per second. At the highest point of oscillation, the spring becomes unstretched. Find the speed when the spring is stretched by $0.20$cm. (Take, $g=\pi^2m/s^2$).
===Choices
$$12.14c... | $$15.4cm/s$$ | general_qa | 172 |
The following is a multiple choice question (with answers).
===Question
What main physical process does the atmospheric water generator use to extract water vapor from the air?
===Choices
Deposition
Precipitation
Sublimation
Evaporation
Condensation and Transpiration
Transpiration
Condensation and Sublimation
Condensa... | Condensation | general_qa | 80 |
The following is a multiple choice question (with answers).
===Question
The city of Cobb has two trust funds for the benefit of the city's library trust fund A and trust fund B. Only the earnings from trust fund A can be expended and both the principal and interest from trust fund B can be expended. How should the city... | Permanent Special revenue | general_qa | 128 |
The following is a multiple choice question (with answers).
===Question
Equal torques act on the discs $A$ and $B$ of the previous problem, initially both being at rest. At a later instant, the linear speeds of a point on the rim of $A$ and another point on the rim of $B$ are ${v}_{A}$ and ${v}_{B}$ respectively. We ha... | $${ v }_{ A }>{ v }_{ B }$$ | general_qa | 248 |
The following is a multiple choice question (with answers).
===Question
Copper reduces $NO_3^-$ into $NO $ and $NO_2$ depending upon concentration of $HNO_3$ in solution. Assuming $[Cu^{2+}] = 0.1\space M$, and $P_{NO} = P_{NO_2} = 10^{-3}$ bar. At which concentration of $HNO_3$, thermodynamic tendency for reduction of... | $$10^{0.66}\space M$$ | general_qa | 331 |
The following is a multiple choice question (with answers).
===Question
What is the accumulated amount of green leaf area of a crop community during a certain reproductive period or throughout the entire reproductive period known as?
===Choices
Leaf area index.
Organic leaf quantity.
Photosynthetic potential.
Growth l... | Photosynthetic potential. | general_qa | 95 |
The following is a multiple choice question (with answers).
===Question
The upgrading of industrial structure is achieved through _____.
===Choices
Reassigning economic growth priorities
Choice of leading industries
Changes in dominant positions among industries
Transformation and development of industries
Altering go... | Changes in dominant positions among industries | general_qa | 88 |
The following is a multiple choice question (with answers).
===Question
In a tubular heat exchanger, what are the trends of K, Q, $t_2$, and $\Delta t_\mathrm{m}$ after the steam pressure increases?
===Choices
K increases; Q decreases; $t_2$ increases; $\Delta t_\mathrm{m}$ remains constant
K remains constant; Q incre... | K remains unchanged; Q increases; $t_2$ increases; $\Delta t_\mathrm{m}$ increases | general_qa | 295 |
The following is a multiple choice question (with answers).
===Question
Given a thick-walled pipe with an inner diameter of 30 mm, separated by an iron membrane with a thickness of 0.1 mm. Nitrogen gas is introduced into the pipe from one end to maintain a nitrogen concentration of $1200 \ \mathrm{mol}/\mathrm{m}^3$ on... | $$
3. 6 \times1 0^{-1 2} \mathrm{~ m^{2} / s}
$$ | general_qa | 457 |
The following is a multiple choice question (with answers).
===Question
In a certain dust settling chamber, each layer has a bottom area of $10\,\mathrm{m}^{2}$, with 5 layers of baffle plates evenly arranged inside. This dust settling chamber is currently used to purify dust-laden air with a mass flow rate of 6000 kg/... | $$
2 4. 2 \mu\mathrm{m}
$$ | general_qa | 374 |
The following is a multiple choice question (with answers).
===Question
A prism of angle $\angle BAC=45^{0}$ and refractive index $\sqrt{6}$ is surrounded by medium of refractive index n. A ray of light PQ is incident on side AB of prism. The refracted ray QR is incident on side AC. The angle of incidence of ray PQ is ... | $$2.5$$ | general_qa | 233 |
The following is a multiple choice question (with answers).
===Question
The conditions that need to be met for a patient with placenta praevia to choose expectant therapy are ____.
===Choices
no prior incidents of miscarriage
occasional fetal heartbeat detected
mild placental detachment observed
positive fetal heartbe... | no other pregnancy complications | general_qa | 77 |
The following is a multiple choice question (with answers).
===Question
The evaporative heating surface tube wall in the furnace of a steam steel boiler is heated by flue gas at a temperature of 1000°C, while the water temperature inside the tube is 200°C. The heat transfer coefficient for the composite heat exchange s... | $$
5207.06W
$$ | general_qa | 332 |
The following is a multiple choice question (with answers).
===Question
Globalization refers to the increasingly broad, deep, and accelerated global interconnections, mainly reflected in which of the following levels?
===Choices
Organizational level (referring to various global organizations and regional groups, etc.)... | Material level (referring to global transportation, information, and banking systems, etc.) | general_qa | 211 |
The following is a multiple choice question (with answers).
===Question
An iron ball of diameter $6 cm$ and is $0.01mm$ too large to pass through a hole in a brass plate when the ball and plate are at a temperature of $20^\circ C$. The temperature at which (both for ball and plate) the ball just pass through the hole i... | $$68^\circ C$$ | general_qa | 204 |
The following is a multiple choice question (with answers).
===Question
Among the following statements about the relationship between national economic planning and national economic strategy, the incorrect one is ( ).
===Choices
development strategy automatically aligns with national economic interests
in terms of sc... | development planning is the foundation of development strategy | general_qa | 164 |
The following is a multiple choice question (with answers).
===Question
A ray of light is sent along the line $x - 2y - 3 = 0$. Upon reaching the line $3x - 2y + 7 = 0$, the ray is. reflected from it. Find the equation of the line containing the reflected-ray.
===Choices
$$29x - 2y - 31 = 0$$
29x - 2y - 25 = 0
29x - 2... | $$29x - 2y - 31 = 0$$ | general_qa | 235 |
The following is a multiple choice question (with answers).
===Question
One mole of a diatomic gas is compressed-to one fourth its original volume $ V_o $ according to law- VT = Constant. The inital pressure is $ p_o $.Then which of the following is not true.
===Choices
$$ \triangle Q = p_o v_o / 2 $$
\(\triangle U =... | $$ \triangle U = 2.5 p_o v_o $$ | general_qa | 189 |
The following is a multiple choice question (with answers).
===Question
A sample of 25 female Drosophila were measured for number of eggs laid in a 24-hour period, and the following counts were recorded: 97 79 88 91 88 86 104 89 91 92 103 96 101 94 91 92 94 95 88 89 90 93 84 87 93 Calculate for this sample: (a)meannumb... | (a) mean = 91.8 eggs / female, (b) variance = 31.17, standard deviation = 5.58, (c) standard error = 1.11 | general_qa | 602 |
The following is a multiple choice question (with answers).
===Question
Female, 32 years old. Sore throat, fever for 3 days, laboratory tests diagnose grass-green bacterial endocarditis, the appropriate drug for treatment is ____.
===Choices
Ampicillin + Metronidazole
Clindamycin + Linezolid
Penicillin V + Gentamicin ... | Penicillin G + Gentamicin B | general_qa | 154 |
The following is a multiple choice question (with answers).
===Question
Given: At 60°C, $k_{\mathrm{p}} = 176 \, \mathrm{L \cdot mol}^{-1} \cdot \mathrm{s}^{-1}$, $[ \mathrm{M} ] = 5.0 \, \mathrm{mol \cdot L}^{-1}$, $\mathrm{N} = 3.2 \times 10^{14}$ molecules·$\mathrm{mL}^{-1}$, $\rho = 1.1 \times 10^{12}$ molecules·$\... | $$
2. 34 \times1 0^{-4},\ 2. 5 6 \times1 0^{5}
$$ | general_qa | 487 |
The following is a multiple choice question (with answers).
===Question
In the mid-19th century, where were the world's national liberation movements concentrated?
===Choices
Europe
Southeast Asia
Australia
Africa
Central Europe
Asia
Latin America
North America
Middle East
Antarctica | Asia | general_qa | 63 |
The following is a multiple choice question (with answers).
===Question
A point $P$ lies inside square $ABCD$ such that $PA = 11, PB = 22,$ and $PC = 33.$ The area of $ABCD$ can be expressed in the form $a + b\sqrt{c}$ , where $a, b,$ and $c$ are positive integers and $c$ is not divisible by the square of any prime. Fi... | 849 | general_qa | 138 |
The following is a multiple choice question (with answers).
===Question
How many gold medals did Kristin Otto win at the 1987 European Championships?
===Choices
7.
5.5.
2.
5.25
5.
5.75
4.
8.
3.
6. | 5. | general_qa | 64 |
The following is a multiple choice question (with answers).
===Question
(a) Find the time period of oscillations of a torsional pendulum,if the torsional constant of the wire is ${K=10\pi^2}{J/rad}$.The moment of inertia of rigid body is ${10 kg m^2}$ about the axis of rotation.
(b) A simple pendulum of length l=0.5... | (a) 2sec, (b) $T=0.628sec$ | general_qa | 416 |
The following is a multiple choice question (with answers).
===Question
Figure shows the orbit of a planet P round the sun S. AB and CD are the minor and major axes of the ellipse. If t$_1$ is the time taken by the planet to travel along ACB and t$_2$ the time along BDA, then :
===Choices
\( t_1 = \frac{t_2}{2} \)
\( ... | $$t_1 > t_2$$ | general_qa | 184 |
The following is a multiple choice question (with answers).
===Question
On which day, month, and year was the Bazina du Gour added to the cultural category of the UNESCO World Heritage Tentative List?
===Choices
July 1, 1996
July 1, 1990
July 1, 1998
July 1, 1997
July 1, 1993
July 1, 1995
July 1, 1999
July 1, 1991
Jul... | July 1, 1995 | general_qa | 145 |
The following is a multiple choice question (with answers).
===Question
Rural building energy-saving systems should be based on ( ) , supplemented by electricity.
===Choices
oil energy and gas energy
nuclear energy and coal energy
solar energy and wind energy
wind turbines and hydroelectric power
sustainable agricultu... | renewable energy and biomass energy | general_qa | 105 |
The following is a multiple choice question (with answers).
===Question
Let G be a non-Abelian group and D(G) be a real representation of group G. If D(R) is the matrix representing element R, which of the following matrix operations will give another valid representation of group G?
===Choices
D(R)ᵀ
D(R)†
Tr(D(R))
D(... | D(R⁻¹) | general_qa | 83 |
The following is a multiple choice question (with answers).
===Question
According to China's Patent Law, which of the following situations does not lose novelty if it occurs within 6 months before the application date?
===Choices
Released in a public lecture series sponsored by government officials.
First announced du... | Disclosed by someone else without the applicant's consent. | general_qa | 161 |
The following is a multiple choice question (with answers).
===Question
What are the main kinetic reasons driving the operation of the biological regeneration life support system?
===Choices
Kinetic Movements within Species
Adaptations of Individual Species
Physical and chemical equipment in the system
Organic Matter ... | Interactions Between Organisms | general_qa | 100 |
The following is a multiple choice question (with answers).
===Question
Among the following works, the representative plays by Alexander Ostrovsky include:
I. Don't Get into Someone Else's Sleigh (Не в свои сани не садись)
II. Poverty is No Vice (Бедность не порок)
III. The Storm (Гроза)
IV. The Poor Bride (Бедная неве... | I and II and III and IV | general_qa | 137 |
The following is a multiple choice question (with answers).
===Question
In which year did the Central Chinese Television Station in Thailand first implement full 24-hour broadcasting?
===Choices
2006
2003
2004
2011
2012
2009
2008
2010
2007
2005 | 2008 | general_qa | 86 |
The following is a multiple choice question (with answers).
===Question
What is the appropriate place on the forearm to hit the ball with both hands on the front?
===Choices
Near the elbow joint
Just above the shoulder
Top of the upper arm
Lower part of the forearm
10cm above the wrist joint
3cm below the wrist joint
... | 10cm above the wrist joint | general_qa | 98 |
The following is a multiple choice question (with answers).
===Question
If a researcher conducted a study in which the criterion for statistical significance was set to 0.05 and statistical power was equal to 0.85:
===Choices
The probability of making a type I and type II error is equal.
The statistical power of the s... | The probability of making a type II error is higher than the probability of making a type I error. | general_qa | 211 |
The following is a multiple choice question (with answers).
===Question
1 g of PMMA is dissolved in 50 mL of benzene at 20°C. The density of PMMA is $1.18\ g\mathrm{cm}^{-3}$, the density of benzene is $0.879 \ \mathrm{g \cdot cm}^{-3}$, and the relative molecular mass is $1 \times 10^{5}$. What is the entropy change?
... | $$
0. 0 7 7 \ ( \mathrm{J} \cdot\mathrm{K}^{-1} )
$$ | general_qa | 407 |
The following is a multiple choice question (with answers).
===Question
Solve the integral:
$$
\int \frac{ \sqrt{9 \cdot x+4} }{ -3 \cdot x^2 } \, dx
$$
===Choices
C + \frac{\sqrt{9 \cdot x + 4}}{3 \cdot x} - \frac{3}{4} \cdot \ln\left(\frac{\left|\sqrt{9 \cdot x + 4} + 2\right|}{2 - \sqrt{9 \cdot x + 4}}\right)
C + \... | C + \frac{\sqrt{9 \cdot x + 4}}{3 \cdot x} - \frac{3}{4} \cdot \ln\left(\frac{\left|\sqrt{9 \cdot x + 4} - 2\right|}{2 + \sqrt{9 \cdot x + 4}}\right) | general_qa | 347 |
The following is a multiple choice question (with answers).
===Question
Consider a unit feedback control system with an open-loop transfer function
$$
G(s) = \frac{a s + 1}{s^{2}}
$$
What is the value of $a$ to make the phase margin equal to 45°?
===Choices
0.920
0.780
0.841
0.630
1.100
1.250
1.370
0.950
0.500
1.720 | 0.841 | general_qa | 130 |
The following is a multiple choice question (with answers).
===Question
Find the angular separation, in second of arc, of the closest double star which can be resolved by the Mount Wilson reflecting telescope, which has a mirror 100 inches in diameter.
===Choices
4.0 × 10^-1 seconds of arc
5.5 × 10^-2 seconds of arc
3... | 5.5 × 10^-2 seconds of arc | general_qa | 178 |
The following is a multiple choice question (with answers).
===Question
A partcle is subjected to two simple harmonic motions (both along x-axis) ${x_1} = A\sin \left( {\omega t - \frac{\pi }{6}} \right)$ and ${x_2} = 2A\cos \omega t$. Find the resultant amplitude of the oscillation
===Choices
$$A\sqrt{8}$$
$$A\sqrt{3... | $$A\sqrt 5 $$ | general_qa | 165 |
The following is a multiple choice question (with answers).
===Question
What is the distortion effect caused by improper modulation of the transmitter in carrier signals in communication systems like fax called?
===Choices
Carson's transmission distortion
Carson distortion
Carson's distortion
Kendall effect
Carson's m... | Kendall effect | general_qa | 90 |
The following is a multiple choice question (with answers).
===Question
What is the pattern of any reverse cycle on the T-s diagram?
===Choices
The ratio of heat absorption to release is 1:1
Heat absorption equals heat release
Heat absorption surpasses heat release consistently
The heat release surpasses absorption at... | Heat absorption is less than heat release | general_qa | 120 |
The following is a multiple choice question (with answers).
===Question
When drilling blast holes with an umbrella drill during shaft construction, to fully utilize the mechanical equipment's performance, the blast hole depth should be ( )?
===Choices
1.0~2.0m
8.0~9.0m
2.0~3.0m
4.0~5.0m
0.5~1.5m
6.0~7.0m
3.0~4.0m
9.0~... | 3.0~4.0m | general_qa | 137 |
The following is a multiple choice question (with answers).
===Question
If the most common operations of a linear list are accessing elements at any specified index and performing insertions and deletions at the end, which storage method is the most time-saving?
===Choices
Stack with linked nodes
Circular Doubly Linke... | Sequential List | general_qa | 106 |
The following is a multiple choice question (with answers).
===Question
What is the most characteristic manifestation of hepatic hydatid disease?
===Choices
Intracystic mass, often described as a mass within a mass, where the opacity of the smaller mass matches that of the larger mass.
Arcuate or eggshell calcificatio... | Intracystic sac, also known as a sac within a sac, where the density of the smaller sac is lower than that of the larger sac. | general_qa | 232 |
The following is a multiple choice question (with answers).
===Question
Calculate the radiation efficiency is() of a thin, Newtonian accretion disk that extends inward to $r_{l}=6 G M / c^{2}$ around a central black hole. Compare your result to the efficiency of a relativistic disk around a nonrotating black hole.
===... | $$
\frac{1} {1 2} ; \ 8. 3 \% \mathrm{~ vs~ 5. 7 \%}
$$ | general_qa | 424 |
The following is a multiple choice question (with answers).
===Question
Which of the following treatment methods for patulous eustachian tube is incorrect?
===Choices
Balloon sinus dilation procedure
Using earwax removal drops
Applying silver nitrate to the eustachian tube orifice
Chewing gum frequently
Loud noise-bas... | Chewing gum frequently | general_qa | 113 |
The following is a multiple choice question (with answers).
===Question
When a certain luminous atom is stationary, it emits light with a wavelength of $0.488 \mu\mathrm{m}$. When it moves away from the observer at a speed of 0.2c, what does the observer perceive the wavelength of the emitted light to be?
===Choices
$... | $$
0. 5 8 5 6 \mu m
$$ | general_qa | 257 |
The following is a multiple choice question (with answers).
===Question
Explain the TRAILER CARD method of stopping a computer job, i.e., a program.
===Choices
The Trailer Card method employs a magnetic tape marker to indicate the end of a program.
The Trailer Card method involves sending an electronic signal through ... | Both 'The Trailer Card method uses a unique number on the last card in the data section of a program card deck to signal the end of a job.' and 'The Trailer Card method uses a specific end-of-job card with a unique identifier to signal the end of a job.' are correct. | general_qa | 271 |
The following is a multiple choice question (with answers).
===Question
Which socio-economic period did Joseph Lister believe should rely on protectionist trade policies?
===Choices
Livestock Farming Era
Industrial and Technological Era
Industrial and Agricultural Period
Agricultural, Maritime and Industrial Era
Agric... | Agricultural and Industrial Era | general_qa | 100 |
The following is a multiple choice question (with answers).
===Question
Markov Decision Process (MDP) is a [ ] process, meaning that the outcomes of actions depend solely on the current state.
===Choices
Continuous-Time Deterministic Control
Continuous-Time Stochastic Control
Discrete-State Deterministic System
Discre... | Discrete-Time Stochastic Control | general_qa | 110 |
The following is a multiple choice question (with answers).
===Question
In adult males, the distance from the upper incisor to the tracheal protuberance is ().
===Choices
30~32cm
22~24cm
23~25cm
Less than 18cm
More than 35cm
28~30cm
19~21cm
26~28cm
34~36cm
20~22cm | 26~28cm | general_qa | 108 |
The following is a multiple choice question (with answers).
===Question
What is the main component of a transparent thrombus?
===Choices
Lymphocytes
Plasma
Fibrinogen
White blood cells
Vitamin K
Leukocytes
Platelets
Neutrophil
Red blood cells
Hemoglobin | Fibrinogen | general_qa | 67 |
The following is a multiple choice question (with answers).
===Question
The best type of fertilizer for fall fertilization of lawns is ____.
===Choices
Natural fertilizer predominantly made of leaf litter and grass clippings
Inorganic fertilizer predominately magnesium and zinc-based
Compost tea fertilizer rich in car... | Compound fertilizer based on phosphorus and potassium fertilizer | general_qa | 138 |
The following is a multiple choice question (with answers).
===Question
The benefits gained by using switching technology came at the expense of what?
===Choices
User privacy
Hardware costs
Storage capacity
Disk space
CPU time
Power consumption
Security protocols
Memory allocation
Software updates
Network bandwidth | CPU time | general_qa | 60 |
The following is a multiple choice question (with answers).
===Question
Which professor led students to conduct a survey on the living conditions of residents in Haidian District, Beijing and Tsinghua school workers?
===Choices
Professor Liu Ming
Professor Zhang Wei
Professor Zhao Hui
Professor Chen Da
Professor Li Ju... | Professor Chen Da | general_qa | 86 |
The following is a multiple choice question (with answers).
===Question
What will be the final concentration of a solution of 50 ml of .5M H_2SO_4 added to 75 ml of .25M H_2SO_4 (the final volume is 125 ml)?
===Choices
40 M H_2SO_4
50 M H_2SO_4
0.25 M H_2SO_4
35 M H_2SO_4
0.55 M H_2SO_4
0.375 M H_2SO_4
0.6 M H_2SO_4
0... | 35 M H_2SO_4 | general_qa | 181 |
The following is a multiple choice question (with answers).
===Question
Which of the following phenomena is not observed in hemolytic anemia?
===Choices
Spherocytes present in blood
Reticulocytes
Elevated white blood cell count
Shortened red blood cell lifespan
Reduced serum erythropoietin levels
Significant rouleaux ... | Significant rouleaux formation | general_qa | 103 |
The following is a multiple choice question (with answers).
===Question
What did Renaissance painters combine with the art of drawing and painting to create paintings with a strong sense of three-dimensional space using the principle of vanishing straight lines?
===Choices
Science
Mathematics
Optical illusions
Cartogr... | Geometry | general_qa | 81 |
The following is a multiple choice question (with answers).
===Question
For high-speed, low-torque, frequent forward and reverse rotation, and two shafts with impact vibration, it is advisable to use ( ) coupling.
===Choices
Flange Coupling
Flexible Disc Coupling
Flexible Bushing Pin Coupling
Diaphragm Coupling
Flexib... | Elastic Bushing Pin Coupling | general_qa | 121 |
The following is a multiple choice question (with answers).
===Question
Object PinConvex Lens Convex Mirror Image Pin 22.2 cm32.2 cm45.8 cm71.2 cm To find the focal length of a convex mirror, a student records the following data:The focal length of the convex lens is ${f}_{1}$ and that of mirror is ${f}_{2}$. Then ta... | $${ f }_{ 1 }=7.8cm\quad \quad { f }_{ 2 }=12.7cm$$ | general_qa | 400 |
The following is a multiple choice question (with answers).
===Question
When was EXILE's single 'Everything' released in Japan?
===Choices
December 6, 2009
December 6, 2005
December 6, 2007
December 6, 2010
December 6, 2001
December 6, 2004
December 6, 2002
December 6, 2006
December 6, 2008
December 6, 2003 | December 6, 2006 | general_qa | 129 |
The following is a multiple choice question (with answers).
===Question
An object with mass $m$ vibrates along the $x$-axis under the influence of an elastic force $-k x$, a damping force $-\alpha\; {\frac{\mathrm{d} x} {\mathrm{d} t}}$, and a driving force $F_{0} \cos \omega t$. Due to the similarity of the motion equ... | $$
Q={\frac{\sqrt{k m}} {a}} \sim{\frac{1} {R}} \sqrt{\frac{L} {C}}
$$ | general_qa | 473 |
The following is a multiple choice question (with answers).
===Question
The atomic mass of $_{9 2}^{2 3 8} \mathrm{U}$ is $238.0486 \mathrm{u}$. Calculate its mass defect, binding energy, and average binding energy.
===Choices
$$
- 1. 9 1 0 6 \mathrm{u}
$$
$$
1 8 5 3. 3 2 1 0 \mathrm{M e V}
$$
$$
7. 0 9 7 \mathrm{M e ... | $$
- 1. 8 8 4 6 \mathrm{u}
$$
$$
1 7 5 5. 5 0 4 9 \mathrm{M e V}
$$
$$
7. 3 7 6 \mathrm{M e V}
$$ | general_qa | 737 |
The following is a multiple choice question (with answers).
===Question
What is the problem caused by excessive water content of brake fluid in hydraulic brake system?
===Choices
Increase brake pressure
Reduce Brake Pad Lifespan
Create noisy brake operation
Increase likelihood of corrosion
Cause rapid brake overheatin... | Reduced braking performance | general_qa | 85 |
The following is a multiple choice question (with answers).
===Question
PIN photodiode, illuminated by $6 \times 10^{12}$ photons with a wavelength of $1.55 \mu m$, produces $2 \times 10^{12}$ photons at the output. What are the quantum efficiency and responsivity?
===Choices
0.54,$6. 0 2 1 \times1 0^{5} V/W$
0.45,$8.... | 0.33,$1. 0 4 2 \times1 0^{6} V/W$ | general_qa | 315 |
The following is a multiple choice question (with answers).
===Question
A block of mass $5 kg$ is pressed against a wall (in YZ-plane) with a force $F=40\hat{i} + 30\hat{j} + 10\hat{k}$. The vetical upword direction is taken as positive $z-axis$. The coefficient of friction is $0.5$. The acceleration of the block is
=... | Zero | general_qa | 343 |
The following is a multiple choice question (with answers).
===Question
In patients with otogenic brain abscess, once brain herniation occurs, which of the following is incorrect?
===Choices
Apply cold compresses to the forehead to reduce fever
Emergency puncture and drainage of the brain abscess
Administer anticoagul... | Do not use dehydrating agents to prevent electrolyte imbalance | general_qa | 139 |
The following is a multiple choice question (with answers).
===Question
What is the typical relationship between the elevation of the top of the outfall pipe and the water level of the natural water body when effluent is discharged from a wastewater treatment plant?
===Choices
Below the mid-range water level
Above the... | Below the normal water level | general_qa | 113 |
The following is a multiple choice question (with answers).
===Question
The instability of an eccentrically loaded column belongs to
===Choices
Second type of stability problem or bifurcation and limit point instability
Second type of stability problem or mixed point instability
Second type of stability problem or bif... | Second type of stability problem or limit point instability | general_qa | 135 |
The following is a multiple choice question (with answers).
===Question
Let $S(n)$ be the sum of the squares of the digits of $n$ . How many positive integers $n>2007$ satisfy the inequality
$$$n-S(n)\le 2007?$$$
===Choices
66
65
67
62
68
69
61
60
64
63 | 63 | general_qa | 95 |
The following is a multiple choice question (with answers).
===Question
The material basis for the cyclical nature of capitalist economic crises is
===Choices
the periodic fluctuation in fixed capital investment
the periodic fluctuation in production capacity
the periodic fluctuation in production technology
the incre... | large-scale renewal of fixed capital | general_qa | 108 |
The following is a multiple choice question (with answers).
===Question
On what day, month, and year was Eyre Chatterton born?
===Choices
22 July 1866
22 July 1860
22 July 1867
22 July 1861
22 July 1864
22 July 1862
22 July 1869
22 July 1865
22 July 1863
22 July 1868 | 22 July 1863 | general_qa | 122 |
The following is a multiple choice question (with answers).
===Question
The raw materials used for high-quality Pu-erh tea are generally selected ().
===Choices
Sprouts
Leaf veins
Flower petals
Tree bark
Root nodules
Green shoots
Outer branches
Seed pods
Mature leaves
Stem buds | Sprouts | general_qa | 67 |
The following is a multiple choice question (with answers).
===Question
What is the energy (in electron volts--see More Precisely $4-1 )$ of a 450-nm blue photon? A 200-nm ultraviolet photon?
===Choices
$$
2. 4 \mathrm{~ e V},
$$
$$
5. 7 \ \mathrm{e V}
$$
$$
2. 6 \mathrm{~ e V},
$$
$$
6. 9 \ \mathrm{e V}
$$
$$
2. 9 \m... | $$
2. 8 \mathrm{~ e V},
$$
$$
6. 2 \ \mathrm{e V}
$$ | general_qa | 358 |
The following is a multiple choice question (with answers).
===Question
For a gaseous reaction.
$$A\left( g \right) + 3B\left( g \right) \to 3C\left( g \right) + 3D\left( g \right)$$
$\Delta \,E$ is $17 Kcal $ at ${27^ \circ }C$ cassuming $R = 2\,cal\,{K^{ - 1}}mo{l^{ - 1}}.$ the value of $\Delta \,H$ for the above rea... | $20$ Kcal | general_qa | 208 |
The following is a multiple choice question (with answers).
===Question
For a thermodynamic system undergoing a state change, the relationship between pressure and volume is given by \( p V^{1.3} = \text{constant} \). If the initial state of the thermodynamic system is \( p_{1} = 600 \ \mathrm{kPa}, \ V_{1} = 0.3 \ \ma... | $$
3 4. 3 6 k J
$$ | general_qa | 284 |
The following is a multiple choice question (with answers).
===Question
The twist coefficient is one of the indexes indicating the twist degree of yarn, which can be used to compare the twist degree of different thicknesses of yarns of the same variety. Yarn strength increases with the increase of twist within a certai... | Critical Twisting Coefficient | general_qa | 144 |
The following is a multiple choice question (with answers).
===Question
What is the molecular mechanism of the Hb β-chain mutation that causes sickle cell anemia?
===Choices
Transcription Termination
Synonymous mutation
Amino Acid Deletion
Base substitution
Base insertion
Base deletion
Protein Misfolding
Nonsynonymous... | Base substitution | general_qa | 80 |
The following is a multiple choice question (with answers).
===Question
Which statement about benzodiazepines is incorrect ( ).
===Choices
Does not interact with any other medications
Safe for use during all stages of pregnancy
Increases the risk of developing autoimmune diseases
Can be used for pre cardiac electrical... | Long term use of medication does not lead to tolerance and dependence | general_qa | 127 |
The following is a multiple choice question (with answers).
===Question
When the free $SiO_2$ content in airborne dust at underground work sites exceeds 10%, the maximum permissible concentration of total dust shall not exceed ( ).
===Choices
$8\ \mathrm{mg/m^3}$
$10\ \mathrm{mg/m^3}$
$7\ \mathrm{mg/m^3}$
$3\ \mathrm{... | $2\ \mathrm{mg/m^3}$ | general_qa | 171 |
The following is a multiple choice question (with answers).
===Question
The radii of the inner sphere and outer spherical shell of a spherical capacitor are $R_{1}$ and $R_{2}$ respectively (with the spherical shell being extremely thin). Assume that the capacitor is very far from the ground and other objects. Now, if ... | $\frac{4 \pi\varepsilon_{0} R_{2}^{2}} {R_{2}-R_{1}}$ | general_qa | 409 |
The following is a multiple choice question (with answers).
===Question
The sterilization method used for Vitamin C Injection is ( ).
===Choices
115°C circulating steam for 30 minutes
100°C circulating steam for 15 minutes
80°C circulating steam for 20 minutes
120°C dry heat for 45 minutes
100°C circulating steam for ... | 100°C circulating steam for 15 minutes | general_qa | 143 |
The following is a multiple choice question (with answers).
===Question
An inductor of 0.5 H and $ 200 \Omega$ resistor are connected in series with A.C. source of 230 V and frequency 50 Hz, then calculate (1) Maximum current in the inductor (2) Phase difference between current and voltage and time difference (time la... | $$ I_{max}=1.28 A, 38^0,8'\, and 2.1\,ms$$ | general_qa | 369 |
The following is a multiple choice question (with answers).
===Question
Generally, in energy and heavy industry bases with large freight demand, because transport demand is heavily dependent on relatively fixed transport modes and routes, the lower the degree of price sensitivity, the demand elasticity will be (); The ... | smaller, bigger | general_qa | 128 |
The following is a multiple choice question (with answers).
===Question
How long does flumazenil work?
===Choices
15 to 30 minutes
70 to 100 minutes
50 to 85 minutes
10 to 20 minutes
90 to 120 minutes
40 to 70 minutes
80 to 110 minutes
120 to 150 minutes
30 to 60 minutes
60 to 90 minutes | 30 to 60 minutes | general_qa | 110 |
The following is a multiple choice question (with answers).
===Question
In which of the following cell(s); $E_{cell} = E_{cell}^{\circ}$?
===Choices
Pt(H_{2}) | pH = 1 | | Zn^{2+} (1\ M) | Zn(s)
$$Pt(H_{2}) | pH = 0.1 | | Zn^{2+} (0.01\ M) | Zn(s)$$
Pt(H_{2}) | H^{+} = 0.1\ M | | Zn^{2+} (1\ M) | Zn(s)
$$Pt(H_{2}) | p... | $$Pt(H_{2}) | pH = 1 | | Zn^{2+}(0.01\ M)| Zn(s)$$ | general_qa | 241 |
The following is a multiple choice question (with answers).
===Question
When there has been a change in accounting principles, but the effect of the change on the comparability of the financial statements is not material, the auditor should
===Choices
Issue a qualified opinion due to the change.
Discontinue the audit ... | Not refer to the change in the auditor's report. | general_qa | 166 |
The following is a multiple choice question (with answers).
===Question
A male, 18 years old, with slender limbs and high myopia. Chest X-ray shows fusiform aneurysmal dilation of the ascending aorta. In addition to the diastolic sighing murmur heard in the second aortic area, which of the following murmurs can also be... | Diastolic rumbling murmur at the apex of the heart | general_qa | 241 |
The following is a multiple choice question (with answers).
===Question
Under the conditions of $298 \, \mathrm{K}, p^{\Theta}$, the density of liquid benzene is $\rho = 0.875 \, \mathrm{g \cdot cm}^{-3}$. What is the $pV$ value of 1 mol of liquid benzene?
===Choices
$$
2. 7 7 \, \mathrm{J} \cdot\mathrm{m o l}^{-1}
$$... | $$
9.03 \, \mathrm{J} \cdot\mathrm{m o l}^{-1}
$$ | general_qa | 372 |
The following is a multiple choice question (with answers).
===Question
Two $110/220 \ \mathrm{kV}, \ \mathrm{Y0}/\mathrm{Y0}$ connected three-phase transformers, each with a capacity of 120 MVA. The first transformer has an excitation current of 4% and per-phase winding-to-ground capacitance of $5000 \ \mathrm{pF}$; t... | $$1.884$$ | general_qa | 238 |
The following is a multiple choice question (with answers).
===Question
The roles of information in modern management of commercial banks include the following aspects:
I. Information serves as the foundation for commercial banks to expand new business and implement financial innovation
II. Information serves as the ba... | I,II,III,IV,V | general_qa | 198 |
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