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 the parallel resonant power amplifier operating at critical condition, a 3DG12B transistor is used. It is known that the utilization factor of the collector voltage at critical condition §cr is $0.94$, $E_{c} = 18 \, \mathbf{V}$, and $\theta = 9... | $$
R_e=71.5 \Omega
$$
$$
P_{dc}=2.72 \mathbf{W}
$$
$$
\eta=73.53 \%
$$
$$
U_{cm}=16.9 \mathbf{V}
$$ | general_qa | 797 |
The following is a multiple choice question (with answers).
===Question
The drainage facility set on the outer side of the road shoulder of an excavated road section or at the foot of a low embankment is called_____.
===Choices
ground discharge
seepage drain
surface trench
shoulder swale
curbside channel
roadside gutt... | side drain | general_qa | 88 |
The following is a multiple choice question (with answers).
===Question
If the tidal wave period at the open boundary of the bay is 12.4 hours and the bay depth is 50 meters, what should the length of the bay be for resonance to occur?
===Choices
288 km
240 km
268 km
210 km
252 km
244 km
257 km
242 km
247 km
273 km | 247 km | general_qa | 108 |
The following is a multiple choice question (with answers).
===Question
Find the general solution of the following Bernoulli equation as () :
$$
\frac{\mathrm{d} y} {\mathrm{d} x}+y=y^{2} \left( \operatorname{c o s} x-\operatorname{s i n} x \right).
$$
===Choices
$$y^{-1}=C e^{x}-\cos x, \text{where } C \text{ is an a... | $$y^{-1}=C e^{x}-\sin x, \text{where } C \text{ is an arbitrary constant}$$ | general_qa | 394 |
The following is a multiple choice question (with answers).
===Question
If there are $n \ (n \geq 2)$ processes in the system, and each process requires 2 instances of a certain critical resource, then the minimum total number of such resources needed to prevent deadlock is ().
===Choices
$$
n-1
$$
$$
n+1
$$
$$
n+2
$$... | $$
n+1
$$ | general_qa | 150 |
The following is a multiple choice question (with answers).
===Question
Which model can be used to describe the vertical distribution of nutrients in seawater?
===Choices
Jenkins' single-layer system
Hamilton's two-box model
Jenkins' two-box model
Gordon's segmented partition model
Hamilton's three-zone framework
Broe... | Broecker's two-box model | general_qa | 100 |
The following is a multiple choice question (with answers).
===Question
An ideal monoatomic gas is confined in a horizontal cylinder by a spring loaded piston(as shown in the figure). Initially the gas is at temperature $T_1$, pressure $P_1$ and volume $V_1$ and the spring is in its relaxed state. The gas is then heate... | If $V_2=3V_1$ and $T_2=4T_1$, then the work done by the gas is $\dfrac{7}{3}P_1V_1$ | general_qa | 493 |
The following is a multiple choice question (with answers).
===Question
The effect of expansionary fiscal policy on aggregate demand is ( )
===Choices
Price level remains unchanged, aggregate demand increases
Price level decreases, aggregate demand increases
Aggregate demand remains unchanged, price level increases
Ag... | Aggregate demand increases at the same price level | general_qa | 118 |
The following is a multiple choice question (with answers).
===Question
In which type of forests are the chir type trees generally noticed?
===Choices
Subtropical montane
Boreal coniferous
Temperate montane
Riverine wetlands
Alpine forest
Coastal mangroves
Wet montane
Subtropical dry evergreen
Arctic tundra
Tropical d... | Temperate montane | general_qa | 84 |
The following is a multiple choice question (with answers).
===Question
Under the conditions of a total pressure of 10.13 kPa and a temperature of 298 K, a gas mixture composed of $\mathrm{N_{2}}$ (A) and He (B) diffuses through a capillary tube that is 0.02 m long with an average diameter of $5 \times 10^{-6} \mathrm{... | $$
4. 5 8 \times1 0^{-6} \, \mathrm{k m o l} / ( \mathrm{m}^{2} \, \cdot\, \mathrm{s} )
$$ | general_qa | 754 |
The following is a multiple choice question (with answers).
===Question
Given that the saturated vapor pressures of W(s) at 2600 K and 3000 K are $7.213 \times 10^{-5} \, \text{Pa}$ and $9.173 \times 10^{-3} \, \text{Pa}$, respectively, what is the molar enthalpy of sublimation $\Delta H_{m}^{\ominus}$ of W(s)? What is... | $$
7 8 5. 6 \mathrm{~ k J ~ \cdot~ m o l}^{-1},\ 6. 5 7 {\times} 1 0^{-2} \mathrm{~ P a}
$$ | general_qa | 672 |
The following is a multiple choice question (with answers).
===Question
An object with an initial temperature of $T_{i}$ is placed in a room with a constant temperature of $T_{0}$. It is cooled through convective and radiative heat transfer. This heat transfer process follows Newton's Law of Cooling:
$\stackrel{\cdot} ... | $$
T_{0} \ +\ ( \ T_{i} \ -\ T_{0} ) \ \cdot\ \operatorname{e x p} \Bigl( \ -\ \frac{h A t} {c m} \Bigr)
$$ | general_qa | 724 |
The following is a multiple choice question (with answers).
===Question
In seismic exploration, what geological phenomenon does the low-velocity zone usually reflect?
===Choices
Lithosphere bending under compression
Areas with higher density
Deposition zones of deep sediments
Compacted areas of fault zones
Ancient vol... | Fracture zones of shallow structures | general_qa | 103 |
The following is a multiple choice question (with answers).
===Question
In logistics support, which of the following are the primary measures for supply?
===Choices
Replenishment, replacement, maintenance
Examining, cataloging, dispatching
Establishing, distributing, overseeing
Enlisting, upgrading, deploying
Managing... | Replenishment, allocation, replacement", "Managing | general_qa | 113 |
The following is a multiple choice question (with answers).
===Question
Huang Zi's art songs were the best works of ____-style art songs in my country at that time.
===Choices
Urban
Residential
Classical
Modern
Experimental
Rural
Traditional
College
Contemporary
Folk | College | general_qa | 64 |
The following is a multiple choice question (with answers).
===Question
The standard enthalpy and entropy changes for the reaction in equilibrium for the forward reaction are given below. $CO(g)+H_{2}O(g)\rightleftharpoons CO_{2}(g)+H_{2}(g) $$\Delta H^{^{\circ}}_{300K}=-41.16 kJ mol^{-1} $$\Delta S^{^{\circ}}_{300K}=-... | At 300 K, the products will be favored more than reactants at equilibrium | general_qa | 345 |
The following is a multiple choice question (with answers).
===Question
If the internal energy of carbon dioxide gas (considered as an ideal rigid molecule gas) with a temperature of 300K in a container is $3.7 4 \times1 0^{3}$J, then the total number of gas molecules in the container is ___.(Boltzmann constant k = $1.... | $3.01 \times10^{23}$ | general_qa | 284 |
The following is a multiple choice question (with answers).
===Question
Which of the following does the meaning of "concept" in social survey research include?
===Choices
Insight, perspective, and background
Observation, conclusion, and hypothesis
Element, category, and framework
Definition, content and status
Descrip... | Definition, content and status | general_qa | 105 |
The following is a multiple choice question (with answers).
===Question
Reference service is the personal service to each reader in helping them to find the document - who gave this definition?
===Choices
Cutter
M. Dewey
M. Pierce
W.C. Berwick
M. Hutchins
Taube
S.R. Ranganathan
Lois Shores
Johnson
F. Lancaster | S.R. Ranganathan | general_qa | 82 |
The following is a multiple choice question (with answers).
===Question
What is the daily time boundary for calculating the average water level in China from ( ) o'clock to ( ) o'clock?
===Choices
08~08
20~20
21~21
0~24
06~06
23~23
18~18
15~15
12~12
10~10 | 0~24 | general_qa | 100 |
The following is a multiple choice question (with answers).
===Question
When the short-circuit current calculation curve is prepared, the calculated reactance is only prepared to 3.5, what is the reason?
===Choices
In practical engineering, there is no situation where the calculated reactance exceeds 3.5.
Should the r... | For power sources with a reactance greater than 3.5, they can be considered as infinite power sources. The effective value of the periodic component of the short-circuit current at any moment is the initial effective value of the periodic component of the | general_qa | 332 |
The following is a multiple choice question (with answers).
===Question
Mention three common types of algae-based gels: brown algae gel, carrageenan, and____.
===Choices
oceanic clay
blue algae powder
marine collagen
seaweed extract
agar
kelp supplement
coastal sand
spirulina
algae oil
fish gelatin | agar | general_qa | 78 |
The following is a multiple choice question (with answers).
===Question
The symbol set of a certain information source consists of A, B, C, D, and E. Assume each symbol appears independently, with their appearance probabilities being 1/4, 1/8, 1/8, 3/16, and 5/16, respectively. Find the average information content of t... | $$
2. 2 3 \mathrm{b i t} /symbol
$$ | general_qa | 290 |
The following is a multiple choice question (with answers).
===Question
Which of these is the smallest unit that natural selection can change?
===Choices
a population's gene frequency
an individual's phenotype
a species' gene frequency
a species' genotype
a population's genotype
a population's phenotype
a cell's gene ... | a population's gene frequency | general_qa | 82 |
The following is a multiple choice question (with answers).
===Question
Density segmentation, similar to a histogram, involves dividing the grayscale values of the original image into equally spaced _________values.
===Choices
variable grayscale
continuous grayscale
discrete grayscale
mixed grayscale
composite graysca... | discrete grayscale | general_qa | 75 |
The following is a multiple choice question (with answers).
===Question
The small wheel with a radius of $r = 50$ mm rolls steadily along the inclined plane. The material in contact is steel, and the rolling friction coefficient is $k = 0.05$ mm. What is the inclination angle $\alpha$ of this inclined plane ? ( Since t... | $$
3'26"
$$ | general_qa | 191 |
The following is a multiple choice question (with answers).
===Question
Evaluate the double integral:
$$
\int \int \rho^2 \, d \varphi \, d \rho
$$
where the integration area $Q$ is bounded by the curve $\rho = a \cdot \sin(2 \cdot \varphi)$.
===Choices
16/9 * a^3
12/9 * a^3
10/12 * a^3
10/9 * a^3
18/9 * a^3
8/9 * a^3... | 8/9 * a^3 | general_qa | 161 |
The following is a multiple choice question (with answers).
===Question
Jared thinks that going to psychology lecture classes is a waste of time and that you can do just as well in the course if you just read the review book, watch "Discovering Psychology," and take the tests. He decides to test his hypothesis with an ... | not going to lecture classes, reading the review book, and watching "Discovering Psychology" | general_qa | 170 |
The following is a multiple choice question (with answers).
===Question
What are all the singularities of the function $f(z) = z^{4} / (1 + z^{4})$, and what are their types?
===Choices
$z=2i$ is a removable singularity of $f(z)$.
$z=0$ is a removable singularity of $f(z)$.
$z=i$ is a simple pole of $f(z)$.
$z=-2i$ is... | $z=\infty$ is a removable singularity of $f(z)$. | general_qa | 212 |
The following is a multiple choice question (with answers).
===Question
The initial velocity of a projectile is $460 m/s$ with an elevation angle of $30°$. Find the radius
of curvature ${\rho}$ of the trajectory 10 seconds after launch, ignoring the effect of air resistance.
===Choices
$$
2 2. 3 9 \mathrm{k m}
$$
$$
1... | $$
1 8. 9 3 \mathrm{k m}
$$ | general_qa | 237 |
The following is a multiple choice question (with answers).
===Question
A 10-mm-diameter Brinell hardness indenter produced an indentation 2.50 mm in diameter in $a$ steel alloy when a load of 1000 kg was used. The HB of this material is().
===Choices
$$
2 0 7. 9
$$
$$
2 0 3. 2
$$
$$
2 1 0. 0
$$
$$
1 9 0. 5
$$
$$
1 9 ... | $$
2 0 0. 5
$$ | general_qa | 197 |
The following is a multiple choice question (with answers).
===Question
The atmospheric pressure on the surface of Mars, where $g=3. 7 \mathrm{~ m ~ s}^{-2},$ is only 0.0060 atm. To what extent is that low pressure due to the low gravitational attraction and not to the thinness of the atmosphere? What pressure would th... | $$
0. 9 8 \mathrm{~ a t m}
$$ | general_qa | 291 |
The following is a multiple choice question (with answers).
===Question
The chlorate ion can disproportionate in basic solution according to reaction,
$$\quad 2ClO_3^- \rightleftharpoons ClO_2^-+ClO_4^-$$
what is the equilibrium concentration of perchlorate ions from a solution initially at $0.1\space M$ in chlorate io... | $$0.019\space M$$ | general_qa | 270 |
The following is a multiple choice question (with answers).
===Question
If the bonding sequence is not considered, how many isomers does linear polyisoprene have?
===Choices
7
8
12
10
6
14
13
9
15
11 | 8 | general_qa | 62 |
The following is a multiple choice question (with answers).
===Question
For a joint, the relationship between structural stress and its direction of action is ().
===Choices
The main stress direction aligns diagonally across both joint planes.
The direction of main stress varies randomly across all joint orientations.... | The direction of maximum principal action is parallel to the longitudinal joint and perpendicular to the transverse joint | general_qa | 187 |
The following is a multiple choice question (with answers).
===Question
A 54-year-old woman. She has been menopausal for 9 years and has had blood-tinged vaginal discharge for 1 week. Colposcopy shows a cervix with an appearance of erosion. Gynecological examination reveals no other abnormalities except for a slightly ... | Cervical cytology | general_qa | 165 |
The following is a multiple choice question (with answers).
===Question
There are two parallel rods, each with a length of $l_{0}$ in their respective rest frames. They are moving at the same speed $\mathbf{v}$ relative to a certain reference frame, but in opposite directions and parallel to the rods. Find the length o... | $l = l_0 \sqrt{1 - \frac{v^2}{c^2}}$ | general_qa | 320 |
The following is a multiple choice question (with answers).
===Question
The main contents of classical decision theory include ().I. Decision-makers must fully grasp information and intelligence about the decision-making environmentII. Decision-makers focus on social benefits while obtaining economic benefitsIII. Decis... | I,III,IV,V | general_qa | 142 |
The following is a multiple choice question (with answers).
===Question
The World Wide Web (WWW) is a network of resources, primarily composed of resources, Uniform Resource Locators (URLs), and ( ).
===Choices
Connection Pathways
Link Interchanges
Resource Codes
Data Sequences
Web Networks
Access Protocols
Transmissi... | Transmission Protocol | general_qa | 80 |
The following is a multiple choice question (with answers).
===Question
How is the cascade system achieved?
===Choices
VCR system in staggered lines
VAR system in modified series
VCR system in series
VAR system in parallel
VCR system with shared conduits
VCR system in parallel
VAR system with dual pumps
VAR system in ... | VCR system in series | general_qa | 86 |
The following is a multiple choice question (with answers).
===Question
One of the methods to supplement amino acids is to use which form of additive?
===Choices
Lectin
Pectin
Chelate
Biomembrane
Collagen
Enzyme
Keratin
Glutamate
Fatty acid
Hormone | Chelate | general_qa | 72 |
The following is a multiple choice question (with answers).
===Question
Let $R$ be the region consisting of the points $(x,y)$ of the cartesian plane satisfying both $|x|-|y| \leq 1$ and $|y| \leq 1$. Find the area of $R$.
===Choices
4
5.8
5.9
6
7
5.5
5
8
5.7
5.2 | 6 | general_qa | 99 |
The following is a multiple choice question (with answers).
===Question
The biological coast is more peculiar; There are commonly coral reef coasts in tropical and subtropical areas, or _____, such as the more developed reef coast along the coast of Hainan Island and the mangrove coast. Mangrove forests are very develo... | rocky shore, sandy beach | general_qa | 234 |
The following is a multiple choice question (with answers).
===Question
What is the purpose of the supply response section (SRS)?
===Choices
To assess market-needs
To track carcass charges
To enhance forecasting
To control requisitions
To coordinate dispatches
To allocate resources
To regulate pricing
To analyze deman... | To control requisitions | general_qa | 79 |
The following is a multiple choice question (with answers).
===Question
The main tasks of information system project planning include the following aspects:
I. Problem Definition
II. Project Feasibility Assessment
III. Requirements Analysis
IV. Project Schedule Planning
===Choices
I,III
IV
I,III,IV
III,IV
I,II,IV
I,II... | I,II,IV | general_qa | 96 |
The following is a multiple choice question (with answers).
===Question
Who is the founder of the Hungarian national music school?
===Choices
Kodály; Wagner; Liszt.
Dvořák; Kodály; Bartók.
Liszt; Dohnányi; Kodály.
Kodály; Liszt; Wagner.
Kodály; Liszt; Dohnányi.
Eckel; Mazzoni; Bartók.
Kodály; Bartók; Liszt.
Bartók; Li... | Eckel; Mazzoni; Bartók. | general_qa | 148 |
The following is a multiple choice question (with answers).
===Question
A second-order irreversible reaction $\mathrm{A} \to \mathrm{B}$ occurs on a porous spherical catalyst with a diameter of 6 mm. When there is no diffusion limitation, the reaction kinetics equation is:
$$
(-r_{\mathrm{A}}) = 0.1 c_{\mathrm{A}}^{2} ... | 0.24 | general_qa | 246 |
The following is a multiple choice question (with answers).
===Question
A step-down chopper circuit has filter component parameters of $L=2 mH, C=330 \mu F$. It is desired that $U_{O}=12 V$ with a chopping frequency of 25kHz. If $U_{s}=25 V$ and the average output current $I_{O}=0.3 A$, calculate the output voltage rip... | $$
1. 8 9 ( \mathrm{m V} )
$$ | general_qa | 283 |
The following is a multiple choice question (with answers).
===Question
What important role does moderate low temperature play in the aging process during plant growth, and what are its effects?
===Choices
Does not affect aging
Enhancing Reproduction
Delaying Senescence
Promoting Aging
Accelerating Growth
Disrupting M... | Inhibiting Aging | general_qa | 87 |
The following is a multiple choice question (with answers).
===Question
Let the function $f(x)=x{{text{e}}^{sin x}}tan x$, then $f(x)$ is on its domain
===Choices
monotonic function
oscillating function
bounded function
oscillating and bounded function
unbounded function
even function
periodic function
oscillating and... | unbounded function | general_qa | 94 |
The following is a multiple choice question (with answers).
===Question
What does the protruding part of the dental crown include?
===Choices
Crest, lingual rise, incisal edges, summits
Cusp, lingual bulge, incisal nodes, crests
Edge, buccal mound, canine peaks, ledges
Summit, oral mound, biting apexes, contours
Cusp,... | Cusp, lingual bulge, incisal nodes, crests | general_qa | 169 |
The following is a multiple choice question (with answers).
===Question
What is the main purpose of doing cool-down exercises after a workout?
===Choices
Build Muscle Endurance Quickly
Bypass Physical Fatigue Permanently
Balance Blood Pressure Post Exercise
Balance Heart Rate Post Workout
Bolster Overall Exercise Effi... | Accelerate the Removal of Metabolic Waste | general_qa | 96 |
The following is a multiple choice question (with answers).
===Question
Where is the distal contact area of the maxillary first molar located?
===Choices
Occlusal one-third, junction between the middle one-third and the lingual one-third on the horizontal plane.
Occlusal one-third, junction between the buccal one-thir... | Occlusal one-third, junction between the middle one-third and the lingual one-third on the horizontal plane. | general_qa | 235 |
The following is a multiple choice question (with answers).
===Question
The realization of the communist ideal is based on the laws of human social development and the development of the fundamental contradictions of capitalist society. Marxism not only provides a general historical argument for the inevitability of th... | Studying the economic movements of capitalism, revealing the characteristics of the capitalist mode of production, and arguing for the self-negating trend of capitalist development. | general_qa | 433 |
The following is a multiple choice question (with answers).
===Question
What is the purpose of processing Polygonum multiflorum?
===Choices
Adjusting resilience
Reducing durability
Maintaining composition
Enhancing color
Increasing flexibility
Improving nutrients
Enhancing appearance
Strengthening textures
Changing pr... | Changing properties | general_qa | 68 |
The following is a multiple choice question (with answers).
===Question
In the 1930s, the programmatic document guiding the reform and development of Soviet national education was ().
===Choices
"Declaration of the People's Commissariat of Education on National Education"
"Framework for Educational Advancement"
"Bluep... | "Decision on Primary and Secondary Schools" | general_qa | 126 |
The following is a multiple choice question (with answers).
===Question
What is the term for fibrous inflammation with relatively mild tissue necrosis?
===Choices
Chronic inflammation
Suppurative inflammation
Fibrinous inflammation
Hemorrhagic inflammation
Acute inflammation
Catarrhal inflammation
Purulent inflammatio... | Pseudomembranous inflammation | general_qa | 83 |
The following is a multiple choice question (with answers).
===Question
Let the function $y=f \left(x \right)$ satisfy the differential equation $y \prime+y={\frac{\mathrm{e}^{-x} \operatorname{c o s} x} {2 \sqrt{\operatorname{s i n} x}}}$, and $f \left(\pi\right)=0$, find the curve $y=f \left(x \right) \left(x \geqsla... | $$ \frac{\pi} {5 ( 1-\mathrm{e}^{-2 \pi} )} $$ | general_qa | 389 |
The following is a multiple choice question (with answers).
===Question
The arrangement of pigment molecules in large lines on the thylakoid membrane is tight and orderly, arranged sequentially from the outside to the inside. This arrangement facilitates energy transfer to the reaction center while ensuring that energy... | Carotenoids, chlorophyll a, chlorophyll b | general_qa | 210 |
The following is a multiple choice question (with answers).
===Question
Hermeneutics indicates that there are differences in methods between social sciences and natural sciences. The method of natural sciences is to explain, whereas the method of social sciences lies in ______.
===Choices
Quantifying
Persuading
Unders... | Understanding | general_qa | 87 |
The following is a multiple choice question (with answers).
===Question
What does static instability mean?
===Choices
$\gamma+\gamma\mathrm{~ d > 0 ~}$
$\gamma-\gamma\mathrm{~ d > 0 ~}$
$\gamma-\gamma\mathrm{~ d < 0 ~}$
$\delta+\delta\mathrm{~ d > 0 ~}$
$\gamma+\gamma\mathrm{~ d < 0 ~}$
$\gamma-\gamma\mathrm{~ d = 0 ~... | $\gamma-\gamma\mathrm{~ d > 0 ~}$ | general_qa | 157 |
The following is a multiple choice question (with answers).
===Question
The City Games held the final of the women's 10,000 meter race, with three athletes each from Hubei, Hunan and Yunnan competing. Before the race, four sports enthusiasts A, B, C and D together to predict the outcome of the event.
Ⅰ: Hubei is the st... | The first place Hubei team, the second place Hubei team, and the third place Hubei team. | general_qa | 403 |
The following is a multiple choice question (with answers).
===Question
Which fruit is commonly grown in tropical climates and has a spiky exterior?
===Choices
Banana
Papaya
Guava
Kiwi
Mango
Lychee
Passion fruit
Dragon fruit
Coconut
Pineapple | Pineapple | general_qa | 66 |
The following is a multiple choice question (with answers).
===Question
What is the reliability of an ignition sequence composed of two primary ignition components and three continuous ignition components, if the design reliability of each ignition component (\(R_i\)) is 0.99?
===Choices
0.951
0.953
0.960
0.945
0.952
... | 0.951 | general_qa | 117 |
The following is a multiple choice question (with answers).
===Question
The odontogenic neoplasm, which is composed of loose, primitive-appearing connective tissue that resembles dental pulp, microscopically is known as _____.
===Choices
Odontogenic myxoid fibrosarcoma
Odontogenic myxoid fibroma
Ameloblastoma
Odontoge... | Odontogenic myxoma | general_qa | 116 |
The following is a multiple choice question (with answers).
===Question
There are two round shafts. One is a solid shaft with diameter \(D_1\), and the other is a hollow shaft with an inner-to-outer diameter ratio \(d_2 / D_2 = 0.8\). If both shafts have the same length, material, torque, and unit-length twist angle, t... | 0.47 | general_qa | 145 |
The following is a multiple choice question (with answers).
===Question
A 50-year-old man presents to the emergency department with a severe headache. The patient reports that it started approx. 2 hours ago and has steadily worsened. He describes it as a stabbing pain localized behind his left eye. The patient reports ... | Administer subcutaneous sumatriptan | general_qa | 402 |
The following is a multiple choice question (with answers).
===Question
The amortized time complexity for inserting elements into a vector of size n, using a strategy that expands by a fixed amount of memory each time, is:
===Choices
$Theta(\sqrt{n})$
$Theta(n + \sqrt{n})$
$Theta(n^2)$
$Theta(n + log_2n)$
$Theta(n + n... | $Theta(n)$ | general_qa | 123 |
The following is a multiple choice question (with answers).
===Question
With respect to Hockett's design features for language, chimpanzees demonstrated their grasp oveach of the following, to some degree at least,__.
===Choices
reflexivity,duality of patterning,traditional transmission
duality of patterning,specializ... | semanticity,arbitrariness,displacement | general_qa | 162 |
The following is a multiple choice question (with answers).
===Question
A block of ice of mask $M=10kg$ is moved back and forth over the flat horizontal surface of a large block of ice. Both block are at $0^oC$ and the force that produces the back-and -forth motion acts only horizontally. The coefficienrt of friction b... | $$863 m$$ | general_qa | 200 |
The following is a multiple choice question (with answers).
===Question
A mild steel wire of length 1.0 m and cross sectional area $0.50\times10^{-2}$ $cm^{2}$ is stretched, well within its elastic limit, horizontally between two pillars. A mass of 100 g is suspended from the mid-point of the wire. Calculate the depres... | 1.07 cm | general_qa | 167 |
The following is a multiple choice question (with answers).
===Question
Place $\mathrm{CaCO_{3} \ (s)}$ in an atmosphere containing $\varphi\left( \mathrm{CO_{2}} \right)=12\%$ with a total pressure of 100 kPa. Find the initial decomposition temperature and the boiling temperature of $\mathrm{CaCO_{3} \ (s)}$.
===Choi... | $$
1 0 5 4 \mathrm{K},1183 \mathrm{K}
$$ | general_qa | 339 |
The following is a multiple choice question (with answers).
===Question
What type of indicator can Meta-Amino Yellow be used as in analytical chemistry?
===Choices
Buffer indicator
Redox indicator
Metal ion indicator
Acid-base indicator
pH indicator
Redox buffer indicator | Acid-base indicator | general_qa | 57 |
The following is a multiple choice question (with answers).
===Question
A plate cam causes a reciprocating roller follower to execute asimple harmonic motion with a maximum displacement of 2 in.The motion comprises of a rise for 140° and a fall for 160° of the cam rotation.The follower's roller is 1 in. in radiusand th... | Perpendicular distance: 1.286 in, Base circle radius: 1.24 in | general_qa | 346 |
The following is a multiple choice question (with answers).
===Question
Which of the following statements about the right of adjacency is correct?
===Choices
Only the second and third statements are correct.
Only the second and last statements are correct.
Only the first and last statements are correct.
All of the abo... | All of the above are correct. | general_qa | 196 |
The following is a multiple choice question (with answers).
===Question
During the Yuan Dynasty, someone wrote an article titled 'Record of the Pavilion of Prince Teng.' To find the author and the original source of this document, one can use the ________.
===Choices
Organized List of Yuan Poetic Writings
Classified I... | Classified Index of Yuan Literary Collections | general_qa | 142 |
The following is a multiple choice question (with answers).
===Question
What is the free settling velocity in air for spherical particles with a density of $2650\mathrm{kg}/\mathrm{m}^{3}$ and a diameter of $50\mu\mathrm{m}$ at $20^{\circ}{C}$ (with air density $\rho=1.205\operatorname{g}/\operatorname{cm}^{3}$ and dyn... | 0.199 | general_qa | 194 |
The following is a multiple choice question (with answers).
===Question
Among the following options, which description about the "Olympic economy" is correct?
===Choices
All revenue from the sale of Olympic tickets by the audience of the host country, including local taxes and ticket sales,
The Organizing Committee of... | The direct benefits for the Organizing Committee of the host country of the Olympic Games include the sale of television broadcasting rights and designated sponsors. | general_qa | 326 |
The following is a multiple choice question (with answers).
===Question
Cough with symptoms of chest fullness and oppression, abundant white and sticky phlegm, shortness of breath and wheezing, inability to lie flat, symptoms worsen with slight exertion, aversion to wind and easy sweating, epigastric and abdominal full... | Su Zi Jiang Qi Tang combined with San Zi Yang Qin Tang with modifications | general_qa | 258 |
The following is a multiple choice question (with answers).
===Question
What is IUCN?
===Choices
Worldwide Conference of Nations
International Union of Climatologists
International Utility Coordination Network
World Conservation Union
International Urban Construction Network
Worldwide Environmental Union
International... | World Conservation Union | general_qa | 77 |
The following is a multiple choice question (with answers).
===Question
Article 156 of Book V of the Code of Manu, an ancient Indian legal code, states: "Women shall be patient, tolerant, zealous, virtuous, and indifferent as students all their lives, and abide by the rules of excellence for women to be consistent." Ar... | Only IV | general_qa | 354 |
The following is a multiple choice question (with answers).
===Question
A particle located at x=0 at time t=0 starts moving along the positive x-direction with a velocity v that varies as $ v= \alpha \sqrt x $ . the displacement of the particles varies with time as
===Choices
$$t$$
$$t^{1/3}$$
$$ t^2 $$
$$t^{3/2}$$
$$... | $$ t^{1/2} $$ | general_qa | 141 |
The following is a multiple choice question (with answers).
===Question
What is a representative culture of the Shandong region?
===Choices
Xia Culture
Half-slope Culture
Erlitou Culture
Liangzhu Culture
Dawenkou Culture
Hongshan Culture
Majiayao Culture
Hemudu Culture
Yangshao Culture
Longshan Culture | Longshan Culture | general_qa | 79 |
The following is a multiple choice question (with answers).
===Question
Suppose there is a staff table that contains "gender" spontaneity and requires that the value of this attribute can only be "male" or "female", which belongs to ().
===Choices
Relationship invariance
Data consistency
User-defined integrity
Data re... | User-defined integrity | general_qa | 88 |
The following is a multiple choice question (with answers).
===Question
The hormone which brings about metamorphosis of the cecropia moth is secreted by a gland in the thorax. However, no metamorphosis takes place if the head is cut off, even though the larva continues to live. Explain.
===Choices
Neither the gland in... | Both the gland in the head and the gland in the thorax of the cecropia moth are necessary for the process of metamorphosis. | general_qa | 272 |
The following is a multiple choice question (with answers).
===Question
Biopsies take diseased tissue by ____.
===Choices
Peripheral resection, external tweezers, broad organ stab, carving
Regional extraction, internal needles, surface nick, pinching
Minor abrasion, endoscopic tweezers, wide organ slice, nicking
Direc... | Local excision, endoscopic forceps, deep organ puncture, scratching | general_qa | 161 |
The following is a multiple choice question (with answers).
===Question
The common adsorption indicator used in legal proceedings by Fajans method is__
===Choices
Alizarin Yellow
Fluorescent Yellow
Malachite Green
Congo Red
Radiant Orange
Eosin Yellow
Crystal Violet
Methyl Red
Phenol Red
Bromothymol Blue | Fluorescent Yellow | general_qa | 80 |
The following is a multiple choice question (with answers).
===Question
What are the types of scanning?
===Choices
Interface, system, and application
Client, server, and passive
Port, network, and services
Active, passive, and server
Interactive, network, and server
Passive, interactive, and vulnerability
Network, vul... | Network, vulnerability, and port | general_qa | 95 |
The following is a multiple choice question (with answers).
===Question
The hydrological cycle is divided into _____ and _____.
===Choices
Evaporation process, Precipitation activity
Water storage, Environmental flow
Major cycle, Minor cycle
Climate alteration, Resource control
Cloud circulation, water cycle
Atmospher... | Major cycle, Minor cycle | general_qa | 95 |
The following is a multiple choice question (with answers).
===Question
In the experiment to determine the Hall coefficient of a semiconductor, the current induced by the external electric field $\mathscr{E}_x$ is called the primary current. Under the influence of the Lorentz force and the Hall electric field, a transv... | $$
B ( \mu_{\mathrm{h}}+\mu_{\mathrm{e}} ) \; \frac{\sigma_{\mathrm{h}} \sigma_{\mathrm{e}}} {( \sigma_{\mathrm{h}}+\sigma_{\mathrm{e}} )^{2}}
$$ | general_qa | 745 |
The following is a multiple choice question (with answers).
===Question
It is known that the field elevation of point A is 53.985 m, and the design elevation of point B is 53.611 m. When a level is placed in the middle of A and B, and the reading is 0.766 m on the ruler of A, and 0.935 m on the ruler of B, what is the ... | Digging 0.205m | general_qa | 206 |
The following is a multiple choice question (with answers).
===Question
News agencies cater to ().
===Choices
prominent broadcast companies
all news organizations
large news corporations
international media outlets
significant media conglomerates
local television stations
regional press agencies
popular radio broadcas... | all news organizations | general_qa | 65 |
The following is a multiple choice question (with answers).
===Question
Where is Mendel's Second Law manifested?
===Choices
During fertilization stage
Mitosis
In the zygote formation phase
In meiosis and mitosis
During DNA replication process
Throughout genetic recombination
During cytokinesis process
In the mitotic d... | During the first meiotic division | general_qa | 84 |
The following is a multiple choice question (with answers).
===Question
Sophocles is called ______ in literary history.
===Choices
"The Ancient Dramatist"
"Master of Comedy"
"Homer in Drama"
"Father of Tragedy"
"The Tragic Genius"
"The Athenian Bard"
"The Greek Shakespeare"
"The Tragic Poet"
"The Classical Playwright"... | "Homer in Drama" | general_qa | 81 |
The following is a multiple choice question (with answers).
===Question
In the process of making magnesium chloride from magnesium oxide, what is the temperature of the chlorination reaction usually controlled at?
===Choices
500-600°C
1000-1100°C
650-750°C
600-700°C
900-1000°C
750-850°C
850-950°C
950-1050°C
700-800°C
... | 800-900°C | general_qa | 134 |
The following is a multiple choice question (with answers).
===Question
Two containers filled with air, A and $\mathbf{B}$, are connected by a fine tube equipped with a piston. Container A is submerged in a water bath with a temperature of $t_{1}=100 \mathrm{°C}$, while container B is submerged in a coolant with a temp... | $$
2. 9 8 \times1 0^{4} \mathrm{Pa}
$$ | general_qa | 447 |
The following is a multiple choice question (with answers).
===Question
A 50-hp, 500-volt shunt motor draws a line current of 4.5 amperes at no load. The shunt field resistance is 250 ohms and the armature resistance, exclusive of brushes, is 0.3 ohm. The brush drop is 2 volts. The full-load line current is 84 amperes.... | 89.45%, 50.36 hp | general_qa | 247 |
The following is a multiple choice question (with answers).
===Question
According to Maxwell's distribution law,the fraction of molecules per unit change to speed [velocity distribution function f(c)],travelling with the speed from C to C $+$ dC is given as:
$$f\left( c \right) = \frac{1}{{dC}}.\left( {\frac{{dN}}{N}} ... | $$320^{o}C$$ | general_qa | 288 |
The following is a multiple choice question (with answers).
===Question
Determine (a) the specific speed of a pump that is to deliver 2,000gpmagainst a head of 150 ft with arotativespeed of 600 rpm.(b) If therotativespeed were doubled, what would bethe flow rate and the head developed by the pump? Assume no change in e... | (a) 625, (b) 4000gpm and 600ft, (c) 625, (d) 365 rpm | general_qa | 537 |
The following is a multiple choice question (with answers).
===Question
Among the following compounds, the one that exhibits all three types of transitions is
===Choices
methyl chloride
1,3-butadiene
ethyl acetate
methanol
methyl acetate
benzene
acetone | acetone | general_qa | 62 |
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