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
Two cyclists set off towards each other simultaneously from points $A$ and $B$. The location where they first meet is $70 \ \mathrm{km}$ from point A. After meeting, they continue to ride at the same speed. Upon reaching points $B$ and $A$, respect... | 120km | general_qa | 177 |
The following is a multiple choice question (with answers).
===Question
China's ancient palace building development through several stages, Tang Daming Palace belongs to which stage?
===Choices
Stone and timber stage
Thatched earth steps
Enclosed courtyard design
Circular palace stage
Before and after the bedchamber
C... | Front Palace after the Court | general_qa | 85 |
The following is a multiple choice question (with answers).
===Question
The electric field intensity of a known uniform plane wave is $E=a_{z} E_{z}=a_{z} \ 0.1 \cos (\omega t-k z) \ \mathrm{V/m}$, where $\omega=2 \pi \times 10^{6} \ \mathrm{rad/s}$. Find: the instantaneous energy flux density vector $S$ and the time-a... | $$
\approx1. 3 3 \times1 0^{-5} a_{z} \quad\mathbf{W} / \mathbf{m}^{2}
$$ | general_qa | 550 |
The following is a multiple choice question (with answers).
===Question
____ is the specific manifestation of zonal laws on the surface of the Earth, which appears as the natural geographic elements or natural complexes generally extending along the latitude lines, arranged regularly according to latitude, resulting in... | Zonal nature | general_qa | 107 |
The following is a multiple choice question (with answers).
===Question
The inertia of the rigid body is $\hat{I}=\left( \begin{matrix} {{{1 5 0}}} & {{{0}}} & {{{-1 0 0}}} \\ {{{0}}} & {{{2 5 0}}} & {{{0}}} \\ {{{-1 0 0}}} & {{{0}}} & {{{3 0 0}}} \\ \end{matrix} \right) \mathrm{kg} \cdot \mathrm{m}^{2}$, and the cente... | $$
1 0 0 0 0 e_{y} ( \mathrm{N} \cdot\mathrm{m} )
$$ | general_qa | 484 |
The following is a multiple choice question (with answers).
===Question
When jumping from a high place, the feet land first, and through reflex activity, the quadriceps and gluteus maximus muscles do ( ) contraction, playing a braking and cushioning effect.
===Choices
oscillatory
rotational
periodic
sequential
reversi... | centrifugal | general_qa | 87 |
The following is a multiple choice question (with answers).
===Question
How many drivers participated in the overnight study in the research paper titled "Detecting Driver Mental Fatigue Based on EEG Alpha Power Changes During Simulated Driving" by Faramarz Gharagozlou et al.?
===Choices
11
15
9
8
14
17
16
13
10
12 | 12 | general_qa | 89 |
The following is a multiple choice question (with answers).
===Question
What are the steps involved in the regeneration process of fibrous tissue?
===Choices
Initially, fibroblasts unite and grow, then form pre-secretory collagen to construct collagen fibers, and finally develop fibroblasts.
First, fibroblasts divide ... | First, fibroblasts divide and proliferate, then synthesize pre-secretory collagen to form collagen fibers, and finally form fibroblasts. | general_qa | 325 |
The following is a multiple choice question (with answers).
===Question
Give nitrogen gas with a mass of $10 \times 10^{-3} \text{ kg}$. When the pressure is 0.101 MPa and the volume is $7700 \text{ cm}^{3}$, what is the average translational kinetic energy of the nitrogen molecule ?
===Choices
$$
4. 0 5 \times1 0^{-2... | $$
5. 4 2 \times1 0^{-2 1} \mathrm{J}
$$ | general_qa | 333 |
The following is a multiple choice question (with answers).
===Question
What is the Rydberg equation for He$^{+}$ ions? (Where $R$ is the Rydberg constant, and $m, n$ are integers).
===Choices
$$
{\widetilde{\nu}}=\mathrm{R} [ \frac{1} {( m / 2 )^{3}}-\frac{1} {( n )^{3}} ]
$$
$$
{\widetilde{\nu}}=\mathrm{R} [ \frac{1... | $$
{\widetilde{\nu}}=\mathrm{R} [ \frac{1} {( m / 2 )^{2}}-\frac{1} {( n / 2 )^{2}} ]
$$ | general_qa | 493 |
The following is a multiple choice question (with answers).
===Question
Pipe A, which is narrow, and Pipe B, which is wide, are connected in series. If the resistance coefficient method is used to calculate h1 = ζu²/2, the u in the formula represents ( ).
===Choices
Flow velocity uA in slender tube A
Pressure differen... | Flow velocity uA in slender tube A | general_qa | 146 |
The following is a multiple choice question (with answers).
===Question
The wire model is 150/25, the unit length mass of the wire is 601kg/km, and the calculated cross-sectional area is 173.11mm². What is the self-weight specific load of the wire?
===Choices
34.50*10-3
34.00*10-3
34.20*10-3
34.07*10-3
34.15*10-3
33.2... | 34.05*10-3 | general_qa | 182 |
The following is a multiple choice question (with answers).
===Question
Find the number of ways to divide the set $\{1,2,3,\dots, 20\}$ into non-empty subsets such that the elements in each subset are consecutive and sum to a multiple of $5$ .
===Choices
134
126
144
136
120
124
132
112
130
128 | 128 | general_qa | 103 |
The following is a multiple choice question (with answers).
===Question
A car staring from rest acceleration at the rate f through a distance s, then continues at constant speed for time t and then deceleration at the rate f/2 to come to rest. I f the metal distance traversed is 5s, then
===Choices
$$s=\dfrac { 1 }{ 2... | $$s=\dfrac { 1 }{ 72 } { ft }^{ 2 }$$ | general_qa | 278 |
The following is a multiple choice question (with answers).
===Question
Through what potential must a proton initially at rest fall so that its de Broglie wavelength is $1.0 \times 10^{-10} \mathrm{~m}$ ?
===Choices
0.030V
0.075V
0.120V
0.150V
0.001V
0.050V
0.100V
0.200V
0.082V
0.250V | 0.082V | general_qa | 125 |
The following is a multiple choice question (with answers).
===Question
Which joint has tendons passing through the joint capsule?
===Choices
Neck Joint
Pelvis Joint
Knee Joint
Finger Joint
Ankle Joint
Spine Joint
Wrist Joint
Hip Joint
Elbow Joint
Shoulder Joint | Shoulder Joint | general_qa | 66 |
The following is a multiple choice question (with answers).
===Question
A logical paradox refers to a situation where two contradictory conditions or statements exist within a proposition, causing the chooser to fall into a dilemma in terms of thinking logic and decision-making. This is what is known as a logical parad... | One day, a shop was robbed, and the police caught two suspects. It was certain that one of them had committed the crime. The police asked who did it. The tall suspect said: 'The short suspect did it.' The short suspect said: 'The tall suspect did it.' After investigation, the police found that both of them were lying. | general_qa | 330 |
The following is a multiple choice question (with answers).
===Question
Weigh 0.2002g of the aluminum-containing sample, dissolve it and adjust the pH to 9. Add 8-hydroxyquinoline ($\mathrm{HOC}_{9}\mathrm{H}_{6}\mathrm{N}$) to precipitate $\mathrm{Al}^{3+}$ as $\mathrm{Al}(\mathrm{OC}_{9}\mathrm{H}_{6}\mathrm{N})_{3}$... | $$
7. 1 8 2 \%
$$ | general_qa | 354 |
The following is a multiple choice question (with answers).
===Question
The Harmonious Garden in China's Summer Palace is modeled after which of the following garden buildings?
===Choices
Lion Grove Garden
Yuyuan Garden
Lingering Garden
Ruan Garden
Lotus Blossom Garden
Humble Administrator's Garden
Jichang Garden
Gold... | Jichang Garden | general_qa | 85 |
The following is a multiple choice question (with answers).
===Question
When viewed on the cross-section of the wood, rays appear radiating outward, each ray displaying its own characteristics( ).
===Choices
Cell Types and Arrangement
Growth Rings and Age
Width and Length
Cross-section
Length and Height
Density and Ha... | Width and Length | general_qa | 86 |
The following is a multiple choice question (with answers).
===Question
In $\vartriangle ABC$ , $\angle A = 30^o$ , $AC = 28\sqrt3$ , and $AB = 42$ . Let $E$ be on side $AC$ and $D$ be on side $AB$ such that $DE$ is perpendicular to $AC$ and $DE = 14$ . If $N = [\vartriangle ECB] - [\vartriangle EDB]$ , find $\lfloor N... | 169 | general_qa | 183 |
The following is a multiple choice question (with answers).
===Question
You are given several identical resistance each of value $R=10$ and each capable of carrying a maximum current of one ampere. It is required to make a suitable combination of these resistance of $5$ which can carry a current of $4$ ampere. The mini... | $$8$$ | general_qa | 124 |
The following is a multiple choice question (with answers).
===Question
Gastrointestinal cancers that only infiltrate the mucosal layer and submucosal layer are called ( ).
===Choices
Benign tumors
precancerous lesions
invasive epithelial growths
superficial mucosal tumors
borderline tumors
localized malignant conditi... | early-stage cancer | general_qa | 90 |
The following is a multiple choice question (with answers).
===Question
Quantity of water available per capita considered adequate to meet the needs of all urban domestic purposes?
===Choices
130-180 L
160-210 L
250-300 L
165-215 L
180-230 L
175-225 L
200-250 L
140-190 L
100-150 L
150-200 L | 150-200 L | general_qa | 124 |
The following is a multiple choice question (with answers).
===Question
The major fundamental issue of all philosophy, especially modern philosophy, is
===Choices
the relationship between thought and existence
the relationship between human consciousness and the material world
the essence of human beings
the origin of... | the relationship between thought and existence | general_qa | 114 |
The following is a multiple choice question (with answers).
===Question
A capacitor has a capacitance of $C {=} 2000 \mathrm{pF,} \ \ \mathrm{tan} \delta{=} 0.01$, and the insulation resistance under direct current is 2000 MΩ. What is the ratio of the equivalent resistance in the parallel equivalent circuit of dielectr... | $$0.0795$$ | general_qa | 189 |
The following is a multiple choice question (with answers).
===Question
Repeatability of test refers to -
===Choices
Same results on similar trials
Same results on repeated trials
Same results on different trials
Consistent results
Same results on repeated tests
Same results on repeated measurements
Precision
Accuracy... | All of the above | general_qa | 74 |
The following is a multiple choice question (with answers).
===Question
For a certain earth fill project, the fill volume is $V = 30,000 \, \mathrm{m}^{3}$, and the required compacted dry density is not less than $\rho_{\mathrm{d}} = 1.70 \, \mathrm{t/m}^{3}$. The optimal moisture content during compaction is $\omega_{... | $$
1 5 3 0 \mathrm{t}
$$ | general_qa | 334 |
The following is a multiple choice question (with answers).
===Question
Gun powder residues on forearms can be detected by?
===Choices
Dermal Nitrite and Sulfate Test
Dermal Nitrite Test
Benzidine Test
Dermal Nitrate and Sulfate Test
Dermal Nitrate Test
Hydrostatic Test
Dermal Nitrate and Nitrite Test
Dermal Nitrate a... | Dermal Nitrate Test | general_qa | 105 |
The following is a multiple choice question (with answers).
===Question
A charged particle of radius $5 \times 10^{-7}$ m is loacted in a horizontal electric field of intensity $6.28 \times 10^5 Vm^{-1}$. The surrounding medium has the coefficient of viscosity $\eta = 1.6 \times 10^5 Nsm^{-2}$. The particle starts movi... | $$3 \times 10^{11}$$ | general_qa | 245 |
The following is a multiple choice question (with answers).
===Question
After the 1840s, under the impact of foreign capitalist economy, China's economy has undergone profound changes. During the two Opium Wars, the goods imported by Western powers to China failed to open up the Chinese market more. The reasons are __.... | The resistance of China's natural economy | general_qa | 170 |
The following is a multiple choice question (with answers).
===Question
What is the total area of Chitwan National Park in square kilometers?
===Choices
952.69 km2
952.30 km2
952.36 km2
952.66 km2
952.60 km2
952.33 km2
952.63 km2
952.64 km2
952.61 km2
952.62 km2 | 952.63 km2 | general_qa | 121 |
The following is a multiple choice question (with answers).
===Question
Spindle deformity of the finger joint is common in ( ).
===Choices
Progressive muscular atrophy
Carpal tunnel syndrome
Psoriatic arthritis involvement
Ulnar nerve injury
Dupuytren's contracture
Osteoarthritis of the hand
Bone tuberculosis
Trigger ... | Rheumatoid arthritis | general_qa | 87 |
The following is a multiple choice question (with answers).
===Question
Soda and lime are added to a glass batch in the form of soda ash (Na $_{2}CO_{y})$ and lime-stone
$(CaCO_{3}).$ During heating, these two ingredients decompose to give off carbon dioxide (CO,the resulting productsbeingsodaaand lime. The weight of s... | $$
\mathrm{l 4. 3} \, \mathrm{l b}_{\mathrm{m}}
$$ | general_qa | 399 |
The following is a multiple choice question (with answers).
===Question
The rate of a reaction triples when temperature changes from $ 20^{\circ} \mathrm{C} $ to $ 50^{\circ} \mathrm{C} $ . Energy of activation for the reaction is $ \left(R=8.314 J K^{-1} m o l^{-1}\right) $
===Choices
$$34.81 \mathrm{KJ} \mathrm{... | 30 $ \mathrm{KJ} \mathrm{mol}^{-1} $ | general_qa | 299 |
The following is a multiple choice question (with answers).
===Question
Who sketched the "Taddei Tondo" soon after it arrived in England and wrote this to Sir George Beaumont: "Your important acquisition of the basso-relievo of Michael Angelo is still the chief talk of all our artists"?
===Choices
Thomas Girtin
John C... | David Wilkie | general_qa | 100 |
The following is a multiple choice question (with answers).
===Question
In each of the following cases, determine whether the given individual sentence is consistent with the given set of sentences.
a. {p ∨ q, p ∨ ¬q, ¬p ∨ q} and (¬p ∨ ¬q)
b. {p ⇒ r, q ⇒ r, p ∨ q} and r
c. {p ⇒ r, q ⇒ r, p ∨ q} and ¬r
d. {p ⇒ q ∨... | inconsistent, consistent, inconsistent, consistent, consistent | general_qa | 256 |
The following is a multiple choice question (with answers).
===Question
When ( x < 0 ), the concavity intervals of the function curve ( y = {x over { { x^2} - 1}} ) are ( ).
===Choices
convex in ( ( - infty , - 1) ) and concave in ( ( - 1, - 0.9) )
convex in ( ( - infty , - 1) ) and concave in ( ( - 1, - 0.85) )
co... | convex in ( ( - infty , - 1) ) and concave in ( ( - 1,0) ) | general_qa | 318 |
The following is a multiple choice question (with answers).
===Question
What is the new educational system that evolves from traditional education to lifelong education?
===Choices
Vocational and Technical Education
Adult Education
Elementary Education
Higher Education
Secondary Education
Basic Education
Graduate Educ... | Adult Education | general_qa | 68 |
The following is a multiple choice question (with answers).
===Question
Known: Lubricating oil No. 14, with an average temperature of $40^{\circ} \mathrm{C}$, flows through a straight pipe with a wall temperature of $80^{\circ} \mathrm{C}$. The pipe is 1.5 meters long and has an inner diameter of 22.1 mm with a flow ra... | $$
8 9 5 W
$$ | general_qa | 286 |
The following is a multiple choice question (with answers).
===Question
Florsheimand Co. accepted a 90-day sight draft for $425.00 on October 10. It was discounted on November 1 at 5%. If their bank charged a (1/3)% collection fee, what were the proceeds?
===Choices
$423.58
$425.00
$421.75
$414.89
$416.00
$422.50
$419... | $419.57 | general_qa | 153 |
The following is a multiple choice question (with answers).
===Question
What geological structural positions commonly develop partition-type folds and slot-type folds?
===Choices
Cannot be determined
Orogenic foreland
Volcanic Region
Continental Rift Valley
Mid-Ocean Ridge
Ocean Basin Floor
Subduction Zone Margin
Crat... | Orogenic foreland | general_qa | 78 |
The following is a multiple choice question (with answers).
===Question
The ______ refers to the process where the ice frozen in the soil or rock strata melts during the day and refreezes at night, or melts in the summer and refreezes in the winter, due to thawing action under
===Choices
thermal expansion block
ice ac... | soil leaching layer | general_qa | 117 |
The following is a multiple choice question (with answers).
===Question
The electromotive force of the power supply at the input terminal of the transformer is $E$, with an internal resistance of $r$. At the output terminal, a load with resistance $R$ is connected. What is the transformer turns ratio when the load rece... | $$
K={\sqrt{\frac{r} {R}}}
$$ | general_qa | 221 |
The following is a multiple choice question (with answers).
===Question
Equation of a wave travelling in a medium is : $y = a \,sin \,(bt - cx).$ Which of the following are correct ?
===Choices
Ratio of the velocity oscillation amplitude of medium particles to the wave propagation velocity is equal to ac / 3.
None of ... | Oscillation amplitude of relative deformation of the medium is directly proportional to velocity oscillation amplitude of medium particles. | general_qa | 229 |
The following is a multiple choice question (with answers).
===Question
What is the total entropy change $(\Delta S_{system}+\Delta S_{surrounding})$ for the following process $4Fe(s)+3O_{2}(g)\rightarrow 2Fe_{2}O_{3}(s)?$
Given : $\Delta S_{reaction}^{0}=-549.4 J/K$
$$\Delta H_{reaction}^{0}= 1648 kJ/mol$$
===Choices... | 5530 $JK^{-1}mol^{-1}$ | general_qa | 253 |
The following is a multiple choice question (with answers).
===Question
The scale used for drawing cross-section diagrams is generally _____.
===Choices
1:50
1:500
1:750
1:400
1:300
1:600
1:200
1:150
1:100
1:250 | 1:200 | general_qa | 87 |
The following is a multiple choice question (with answers).
===Question
We now define an algorithm: The definition of a(n) is the coefficients in the expansion of the Molien series for the invariants of the 3-dimensional group [3,4]+ = 432. Given the input x_list (a series of values): [59, 60, 61, 62, 63, 64, 65, 66, 6... | [65, 91, 70, 96, 75, 102, 80, 108, 85, 114] | general_qa | 550 |
The following is a multiple choice question (with answers).
===Question
Who sketched the "Taddei Tondo" following its arrival at the Royal Academy and published a letter in the Athenaeum of 3 July 1830 praising how it was lit?
===Choices
William Blake
William Turner
William Etty
Thomas Lawrence
Joseph Mallord William ... | John Constable | general_qa | 82 |
The following is a multiple choice question (with answers).
===Question
The amplitude of $e ^ { e ^ { - i \theta } } =$
===Choices
$$e ^ { \sin \theta }$$
\cos \theta
$$- \sin \theta$$
e ^ { \cos (2\theta) }
e ^ { - \sin \theta }
$$\sin \theta$$
-e ^ { \sin \theta }
$$e ^ { \cos \theta }$$
e ^ { - \cos \theta }
-\cos... | $$- \sin \theta$$ | general_qa | 119 |
The following is a multiple choice question (with answers).
===Question
Most animals have red-colored blood, but some animals' blood appears in different colors. What is the reason for this?
===Choices
Related to the pressure at which blood circulates.
Related to the temperature of the animal's body.
Related to the ty... | Related to the element in the blood responsible for transporting oxygen. | general_qa | 137 |
The following is a multiple choice question (with answers).
===Question
What material is suitable for large volume concrete engineering?
===Choices
Polymer cement mortar
Super sulfate cement
Fly ash blend
Slag cement
Ordinary Portland cement
High alumina cement
Gypsum plaster
Portland cement
Epoxy resin mixture
Magnes... | Slag cement | general_qa | 72 |
The following is a multiple choice question (with answers).
===Question
The $\mu^{-}$ can be considered a "heavy electron," with a mass approximately 200 times that of an electron. If the ground state energy of the hydrogen atom is $E_{0}$, then the ground state energy of the exotic atom formed by the $\mu^{-}$ and the... | $$
2 0 0 \ E_{0}
$$ | general_qa | 222 |
The following is a multiple choice question (with answers).
===Question
What are the benefits of having a file backed up in multiple locations in HDFS?
===Choices
Reduced the system's availability
Ensure the integrity of the document
Reduced data read speed
Enhancing the Scalability of Services
Ensured the uniqueness ... | Enhancing the Scalability of Services | general_qa | 98 |
The following is a multiple choice question (with answers).
===Question
A certain computer has a word length of 32 bits, and the memory cycle time is 200 ns. Four-way interleaving is used, employing the lower 2 bits of the address as the memory bank address, and the data is stored sequentially by address. What is the s... | 50ns | general_qa | 132 |
The following is a multiple choice question (with answers).
===Question
$A(s) \leftrightharpoons B(g) +C(g) $ $K_{P_1}= 36 atm^2$
$E(s) \leftrightharpoons B(g) +D(g) $ $K_{P_2}= 64 atm^2$
Both solids A & E were taken in a container of constant volume at a given temperature. Total pressure in the container after... | $20$ atm | general_qa | 157 |
The following is a multiple choice question (with answers).
===Question
Which community was the first to be called a People's Commune in China?
===Choices
Z eryi Mountain Southern People's Commune
Z eryi Mountain Northern People's Commune
Z eryi Mountain Initial People's Commune
Z eryi Mountain Central People's Commun... | Z eryi Mountain Satellite People's Commune | general_qa | 131 |
The following is a multiple choice question (with answers).
===Question
Which is the larva of coelenterate?
===Choices
Polypodium
Plantrae
Placozoa
Hydrozoa
Cnidocyte
Tentaculum
Nematocyte
Medusoid
Medusozoa
Anthozoa | Plantrae | general_qa | 71 |
The following is a multiple choice question (with answers).
===Question
For a cell reaction of the type T + R^+2 \leftrightarrows R + T^+2 , calculate the value that E° must have so that the equilibrium concentration of T^+2 is a thousand times the R^+2 concentration.
===Choices
.078 volt
.048 volt
.038 volt
.108 volt... | .088 volt | general_qa | 129 |
The following is a multiple choice question (with answers).
===Question
A superconducting rod of mass $m$ is placed on two resistanceless parallel smooth rails connected by a resistor of resistance $R$. Uniform magnetic field $B$ is acting perpendicular to the plane of loop. At $t=0$ velocity $v_0$ is given to the rod.... | zero | general_qa | 279 |
The following is a multiple choice question (with answers).
===Question
The only definite indication for systemic coicosteroids in a case of pustular psoriasis is?
===Choices
Psoriatic ahritis of moderate degree
Psoriatic Erythroderma with severe pruritus and liver dysfunction
Psoriatic Erythroderma with severe prurit... | Psoriatic Erythroderma with pregnancy | general_qa | 121 |
The following is a multiple choice question (with answers).
===Question
Which of the following is a renewable energy source?
===Choices
Solar
Oil
Natural gas
Wood
Coal
Wind
Both Wood and Solar are correct
Uranium
Diesel
Propane | Both Wood and Solar are correct | general_qa | 56 |
The following is a multiple choice question (with answers).
===Question
Who directed S1E8 of Abstract: The Art of Design?
===Choices
Sarah Romaine
Sarah Romina
Sara Romas
Sarina Roma
Sarah Romas
Sarah Roma
Sara Romina
Sara Romain
Sara Roma
Sara Romaine | Sarina Roma | general_qa | 76 |
The following is a multiple choice question (with answers).
===Question
A body is brought to you for autopsy. The apparent cause of death is snake bite. On examination there is a haemorrhagic region surrounding a puncture mark over his left shoulder region. The area surrounding the puncture mark is necrosed and subsequ... | Abrus precatorius | general_qa | 147 |
The following is a multiple choice question (with answers).
===Question
What is the equation of motion for multi support excitation and spatial variation?
===Choices
$\mathrm{M \ddot{u}+K \ddot{u}+C {u}=-[ M_{g} r+M ] \ddot{u}_{g}}$
$\mathrm{M \ddot{u}+K \dot{u}+C {u}=-[ M_{g} r+M ] \ddot{u}_{g}}$
$\mathrm{M \ddot{u}+... | $\mathrm{M \ddot{u}+C \ddot{u}+K {u}=-[ M r+M_{g} ] \ddot{u}_{g}}$ | general_qa | 454 |
The following is a multiple choice question (with answers).
===Question
A certain $500 \mathrm{kV}$ line is $400 \mathrm{km}$ long, $\sin \lambda = 0.41$. The line surge impedance is $Z = 260 \Omega$. The line is open-circuited at the end with no parallel reactor. The ratio of the steady-state power frequency voltage a... | $$ 788~\Omega
$$ | general_qa | 257 |
The following is a multiple choice question (with answers).
===Question
Consider a uniformly doped $n\text{-GaAs}$ crystal with an equilibrium electron concentration of $n_{0}$. Due to certain inhomogeneities or thermal disturbances in the medium, there is an increment in electron concentration denoted as $\delta n$. A... | $$
0. 7 2 \times1 0^{-9} ( \mu s )
$$ | general_qa | 392 |
The following is a multiple choice question (with answers).
===Question
In order to achieve good power transmission to the medium and extend bandwidth for sound radiation, a $\frac{\lambda}{4}$ matching layer (which also serves as a protective layer) can be used between the piezoelectric chip of the transducer and the ... | Z = 7.1 x 10 $^{6}$Pa·s/m | general_qa | 368 |
The following is a multiple choice question (with answers).
===Question
When was Agencia EFE founded?
===Choices
1938
1933
1934
1937
1939
1935
1940
1931
1936
1932 | 1938 | general_qa | 74 |
The following is a multiple choice question (with answers).
===Question
HD 63454 is a K4V star known to have an extrasolar planet orbiting it in a circular orbit with an orbital period of 2.81782 d, producing a maximum radial reflex velocity of 64 3 m $\mathrm{S}^{-1}$ relative to the center of mass of the star. The di... | $$
5. 2 \times1 0^{9} \mathrm{m}.
$$ | general_qa | 335 |
The following is a multiple choice question (with answers).
===Question
Generally speaking, by increasing the temperature of the dye solution, the _____ of the dye in the dye solution increases.
===Choices
reflection
concentration
clarity
volume
dispersion
saturation
absorption
consistency
density
stability | dispersion | general_qa | 66 |
The following is a multiple choice question (with answers).
===Question
In what year did the Whitney Museum of American Art devote an entire floor to Julie Mehretu for the first time?
===Choices
2024.
2020.
2027.
2022.
2026.
2018.
2025.
2021.
2019.
2023. | 2021. | general_qa | 91 |
The following is a multiple choice question (with answers).
===Question
Which city applied for the Saman dance to be listed in the National Intangible Cultural Heritage Catalogue?
===Choices
Kashi Prefecture
Kashi City
Kashi Town
Kashgar City
Kashgar Town
Kashgar Region
Kashi Region
Kashgar Municipality
Kashgar Prefec... | Kashi City | general_qa | 86 |
The following is a multiple choice question (with answers).
===Question
A nonconducting spherical shell, with an inner radius of $4.0 \mathrm{~cm}$ and an outer radius of $6.0 \mathrm{~cm}$, has charge spread nonuniformly through its volume between its inner and outer surfaces. The volume charge density $\rho$ is the c... | $3.8$ $10^{-8} \mathrm{C}$ | general_qa | 326 |
The following is a multiple choice question (with answers).
===Question
_____ is the main food source in the soft-bottom intertidal zones, whereas seaweed is the main food source in the hard-bottom intertidal zones.
===Choices
Fish
Algae
Krill
Sand
Plankton
Detritus
Shellfish
Zooplankton
Silt
Coral | Detritus | general_qa | 81 |
The following is a multiple choice question (with answers).
===Question
Lidocaine is ineffective for which of the following arrhythmias:
===Choices
Premature Ventricular Contractions
Ventricular Fibrillation
Premature Ventricular Contractions due to Myocardial Infarction
Atrial Fibrillation
Atrial Fibrillation with Sl... | Supraventricular Tachycardia | general_qa | 121 |
The following is a multiple choice question (with answers).
===Question
A uniform rectangular thin plate weighing 50 N is suspended and can freely rotate around a horizontal edge. A steady wind causes the plate to maintain an angle of 18° with the vertical plane.What is the pressure exerted by the wind perpendicular to... | 15.5 $\mathbf{N}$ | general_qa | 179 |
The following is a multiple choice question (with answers).
===Question
Prepare a cast-in-place reinforced concrete beam with C25, the cross-sectional dimensions are 300*500, the diameter of the reinforcing bars is 20mm, the minimum center-to-center distance between the bars is 80mm, the nominal size of the aggregate s... | 5~40 | general_qa | 139 |
The following is a multiple choice question (with answers).
===Question
The term 'particle park' was first proposed or promoted by which scientist at the 1956 VI Rochester International High Energy Physics Conference?
===Choices
Werner Heisenberg
Enrico Fermi
Niels Bohr
Robert Oppenheimer | Robert Oppenheimer | general_qa | 66 |
The following is a multiple choice question (with answers).
===Question
___________refers to the number of people per unit of agriculturally usable land area.
===Choices
Agronomic count
Soil occupancy rate
Land development ratio
Harvestable proportion
Physiological density
Farming density
Cultivation index
Agricultura... | Physiological density | general_qa | 80 |
The following is a multiple choice question (with answers).
===Question
Given $g(x) = \frac{ 1 }{ 3 } \cdot (a+b) \cdot x^3 + \frac{ 1 }{ 2 } \cdot (a+b+c) \cdot x^2 - (a+b+c+d) \cdot x + a \cdot b \cdot c \cdot d$, simplify the derivative of $g(x)$ if $x^2 + x = a + b$.
===Choices
(a+b)^2+c*x-(a+b+c+d+6)
(a+b)^2+c*x-... | (a+b)^2+c*x-(a+b+c+d) | general_qa | 245 |
The following is a multiple choice question (with answers).
===Question
Fix an integer $b \geq 2$. Let $f(1) = 1$, $f(2) = 2$, and for each $n \geq 3$, define $f(n) = n f(d)$, where $d$ is the number of base-$b$ digits of $n$. For which values of $b$ does \[ \sum_{n=1}^\infty \frac{1}{f(n)} \] converge?
===Choices
7
9... | 2 | general_qa | 139 |
The following is a multiple choice question (with answers).
===Question
Consider a two-stage compression refrigeration system operating between the pressure limits of 0.8 and 0.14 MPa. The working fluid is refrigerant-134a. The refrigerant leaves the condenser as a saturated liquid and is throttled to a flash chamber o... | 0.2050 | general_qa | 268 |
The following is a multiple choice question (with answers).
===Question
In which two years did Nechayev publish "Sports Psychology"?
===Choices
1921,1930
1931,1937
1927,1933
1929,1936
1928,1931
1924,1938
1927,1930
1921,1933
1925,1934
1930,1942 | 1927,1930 | general_qa | 130 |
The following is a multiple choice question (with answers).
===Question
The far-infrared spectrum of HBr consists of a series of spectral lines spaced $17cm^{-1}$ apart. What is the internuclear distance of HBr?
===Choices
$$
4. 9 \times1 0^{-8} \mathrm{c m}
$$
$$
9. 6 \times1 0^{-8} \mathrm{c m}
$$
$$
3. 1 \times1 0^... | $$
1. 4 \times1 0^{-8} \mathrm{c m}
$$ | general_qa | 271 |
The following is a multiple choice question (with answers).
===Question
What are the core concepts of Schenkerian analysis theory - the fundamental structure (Ursatz) - comprised of?
===Choices
Fundamental tones (Diatonie) and arpeggios; Brechung (breaking, bass)
Urlinie (fundamental line) and Bassbrechung (bass break... | Urlinie (fundamental line) and Bassbrechung (bass breaking) | general_qa | 122 |
The following is a multiple choice question (with answers).
===Question
Who is the main director of the animated film 'Dream of the Competition'?
===Choices
Wang Xiaoshuai
Zhang Yimou
Jia Zhangke
Chen Kaige
Wen Muye
Lu Chuan
Han Han
Xu Zheng
Ning Hao
Yongchang Zhang | Yongchang Zhang | general_qa | 79 |
The following is a multiple choice question (with answers).
===Question
$82$ litres of carbon dioxide are produced at a pressure of $1$ atm and $25^\circ C$ by the action of acid on metal carbonate. The work done by gas (in calories) in pushing back the atmosphere is ($R = 0.082$ litre-atm $\text{deg}^{-1} \text{mol}^{... | $$2000$$ | general_qa | 153 |
The following is a multiple choice question (with answers).
===Question
It is known that in a vacuum, there is a uniform plane wave with an electric field strength $\boldsymbol{E}=E_{x} \boldsymbol{e}_{x}+E_{y} \boldsymbol{e}_{y}$. Here, $E_{x}=100 \cos (2 \pi \times 10^{8} t - 0.21 z) \; \mathrm{V/m}$, and $E_{y}=100 ... | $$
\dot{H}=0. 1 8 7 e^{-0. 2 1 z} \big( \boldsymbol{e}_{y}-\mathrm{j} e_{x} \big) \, \mathrm{A / m}
$$ | general_qa | 696 |
The following is a multiple choice question (with answers).
===Question
Which of the following about geochemical province is correct?
===Choices
In a certain large area of the Earth's crust, certain components are particularly enriched, with not only one or two types of rocks showing especially high element abundance,... | In a certain large area of the Earth's crust, certain components are particularly enriched, with not only one or two types of rocks showing especially high element abundance, but also deposits of these elements often appearing in groups, resulting in a particularly high occurrence rate | general_qa | 431 |
The following is a multiple choice question (with answers).
===Question
Afternoon fever can be seen in ______.
===Choices
Taiyin damp-heat accumulation
Cold syndrome with heat inversion
Yin deficiency with excessive fire
Wind-heat affecting the liver
Jueyin blood deficiency syndrome
Shaoyin cold syndrome
Excessive phl... | Yangming bowel syndrome | general_qa | 96 |
The following is a multiple choice question (with answers).
===Question
The correct statement about the selection of base variables in linear programming is( )
===Choices
The variable with the maximum change in the objective function caused by the unit change should be included in the basis
The variable with an averag... | The variable with the maximum change in the objective function caused by the unit change should be included in the basis | general_qa | 186 |
The following is a multiple choice question (with answers).
===Question
Using a settling chamber to remove dust particles from the dust-laden gas, with particle density $\rho_{\mathrm{p}} = 3500\, \mathrm{kg}/\mathrm{m}^{3}$, the chamber is 5 m long, 11 m wide, and 1 m high. The dust-laden gas has a viscosity $\mu = 2.... | 25.2% | general_qa | 254 |
The following is a multiple choice question (with answers).
===Question
A 30-year-old woman presents with a history of pregnancy: miscarriage? Termination... followed by secondary infertility for 3 years. In the past six months, her menstrual cycle has been irregular. After 3 months of amenorrhea, she experienced irreg... | Choriocarcinoma | general_qa | 243 |
The following is a multiple choice question (with answers).
===Question
At how many centimeters above the pit surface should straw silage be sealed immediately after being filled?
===Choices
30-40
25-35
55-65
10-20
20-30
60-70
40-50
50-60
15-25
45-55 | 50-60 | general_qa | 96 |
The following is a multiple choice question (with answers).
===Question
In cucumber seedling cultivation, when using ____ for grafting, the cutting direction is () for black-seeded pumpkin and () for the cucumber.
===Choices
Side-veneer grafting, straight upward, straight downward.
Chip budding method, diagonally down... | Approach grafting method, diagonally downward, diagonally upward. | general_qa | 179 |
The following is a multiple choice question (with answers).
===Question
What is the sediment size corresponding to beginning of motion when the shear velocity $u_{*}=0. 1 \ \mathrm{m / s?}$
===Choices
$$
d_{s}=1. 2 8 \ \mathrm{c m}
$$
$$
d_{s}=1. 8 5 \ \mathrm{c m}
$$
$$
d_{s}=1. 7 8 \ \mathrm{c m}
$$
$$
d_{s}=1. 3 1 ... | $$
d_{s}=1. 3 1 \ \mathrm{c m}
$$ | general_qa | 259 |
The following is a multiple choice question (with answers).
===Question
Female, 43 years old. Prolonged menstrual cycle for 2 years. Menstruation comes about once in 2 months, with a period of 8-10 days and a heavy menstrual flow. In order to define the abnormal uterine bleeding typology, the most valuable adjunctive t... | endometrial biopsy | general_qa | 151 |
The following is a multiple choice question (with answers).
===Question
The half life period of a first order chemical reaction is 6.93 minutes. Time required for the completion of 99% of the chemical reaction will be $(log 2 = 0.301) :$
===Choices
230.6 minutes
11.515 minutes
230.30 minutes
23.33 minutes
46.06 minute... | 23.03 minutes | general_qa | 136 |
The following is a multiple choice question (with answers).
===Question
What is the right atrioventricular valve of birds that is different from mammals?
===Choices
Muscle valve
Spiral valve
Fibrous valve
Membrane valve
Cartilage valve
Rigid valve
Composite valve
Valve of the sinus
Elastic valve
Tendon valve | Muscle valve | general_qa | 76 |
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