问答

1答疑

[Critical Reasoning]

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文章：

A company's two divisions performed with remarkable consistency over the past three years: in each of those years, the pharmaceuticals division has accounted for roughly 20 percent of dollar sales and 40 percent of profits, and the chemicals division for the balance

题目：

Which of the following can properly be inferred regarding the past three years from the statement above?

选项:

A、Total dollar sales for each of the company's divisions have remained roughly constantThe pharmaceuticals division has faced stiffer competition in its markets than has the chemicals division.
B、The chemicals division has realized lower profits per dollar of sales than has the pharmaceuticals division.
C、The product mix offered by each of the company's divisions has remained unchanged. 
D、Highly profitable products accounted for a higher percentage of the chemicals division's sales than those of the pharmaceuticals division's.

答案:

C
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[Problem Solving]

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题目：

If n = (33)43 + (43)33, what is the units digit of n?

选项:

A、0
B、2
C、4
D、6
E、8

答案:

A
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[Problem Solving]

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题目：

If [x] is the greatest integer less than or equal to x, what is the value of [‒1.6] + [3.4] + [2.7]?

选项:

A、3
B、4
C、5
D、6
E、7

答案:

A
1答疑

[Reading Comprehension]

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文章：

In terrestrial environments, gravity places special demands on the cardiovascular systems of animals.  Gravitational pressure can cause blood to pool in the lower regions of the body, making it difficult to circulate blood to critical organs such as the brain.  Terrestrial snakes, in particular, exhibit adaptations that aid in circulating blood against the force of gravity.

 

The problem confronting terrestrial snakes is best illustrated by what happens to sea snakes when removed from their supportive medium.  Because the vertical pressure gradients within the blood vessels are counteracted by similar pressure gradients in the surrounding water, the distribution of blood throughout the body of sea snakes remains about the same regardless of their orientation in space, provided they remain in the ocean. When removed from the water and tilted at various angles with the head up, however, blood pressure at their midpoint drops significantly, and at brain level falls to zero.  That many terrestrial snakes in similar spatial orientations do not experience this kind of circulatory failure suggests that certain adaptations enable them to regulate blood pressure more effectively in those orientations.

 

One such adaptation is the closer proximity of the terrestrial snake's heart to its head, which helps to ensure circulation to the brain, regardless of the snake's orientation in space.  The heart of sea snakes can be located near the middle of the body, a position that minimizes the work entailed in circulating blood to both extremities.  In arboreal snakes, however, which dwell in trees and often assume a vertical posture, the average distance from the heart to the head can be as little as 15 percent of overall body length.  Such a location requires that blood circulated to the tail of the snake travel a greater distance back to the heart, a problem solved by another adaptation.  When climbing, arboreal snakes often pause momentarily to wiggle their bodies, causing waves of muscle contraction that advance from the lower torso to head.  By compressing the veins and forcing blood forward, these contractions apparently improve the flow of venous blood returning to the heart.

题目：

The author suggests that which of the following is a disadvantage that results from the location of a snake's heart in close proximity to its head?

选项:

A、(A) A decrease in the efficiency with which the snake regulates the flow of blood to the brain
B、(B) A decrease in the number of orientations in space that a snake can assume without loss of blood flow to the brain
C、(C) A decrease in blood pressure at the snake's midpoint when it is tilted at various angles with its head up
D、(D) An increase in the tendency of blood to pool at the snake's head when the snake is tilted at various angles with its head down
E、(E) An increase in the amount of effort required to distribute blood to and from the snake's tail 

答案:

E
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[Problem Solving]

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题目：

Clarissa will create her summer reading list by randomly choosing 4 books from the 10 books approved for summer reading. She will list the books in the order in which they are chosen. How many different lists are possible?

选项:

A、a minute size
B、momentum
C、position in space
D、sporadic movement
E、wave-like behavior

答案:

D
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[Sentence Correction]

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题目：

Despite Japan's relative isolation from world trade at the time, the prolonged peace during the Tokugawa shogunate produced an almost explosive expansion of commerce.

选项:

答案:

A
1答疑

[Sentence Correction]

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题目：

Organized in 1966 by the Fish and Wildlife Service,the Breeding Bird Survey uses annual roadside counts along established routes for monitoring of population changes of as many as, or of more than 250 bird species, including 180 songbirds.

选项:

A、for monitoring of population changes of as many as, or ofto monitor population changes of as many, or
B、to monitor changes in the populations of
C、that monitors population changes of
D、that monitors changes in populations of as many as,or

答案:

C
1答疑

[Reading Comprehension]

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题目：

The passage suggests that the opposition to banks in the South in the early nineteenth century stemmed in part from the perception that banks

选项:

A、did not benefit more than a small minority of the people
B、did not support the interests of elite planters
C、were too closely tied to transportation and industrial interests
D、were unwilling to issue the long-term loans required by agrarian interests
E、were too willing to lend credit widely

答案:

A
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[Problem Solving]

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题目：

The number line shown contains three points R, S, and T, whose coordinates have absolute values r, s, and t, respectively. Which of the following equals the average (arithmetic mean) of the coordinates of the points R, S, and T ?

选项:

A、s
B、s + t - r
C、
D、
E、

答案:

E
1答疑

[Reading Comprehension]

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文章：

题目：

The information in the passage suggests that Clark believes that which of the following would be true if social constructivism had not gained widespread acceptance?

选项:

A、Businesses would be more likely to modernize without considering the social consequences of their actions.
B、There would be greater understanding of the role played by technology in producing social change.
C、Businesses would be less likely to understand the attitudes of employees affected by modernization.
D、Modernization would have occurred at a slower rate.
E、Technology would have played a greater part in determining the role of business in society.

答案:

B
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374浏览

[Undefined]

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Art historian: Unlike many artistic traditions that sought to depict plants native to the local area in a seasonally appropriate way (for example, depicting scenes of spring with the plants in the appropriate stages of development for that season), seventeenth-century Dutch artists specializing in flower paintings almost exclusively chose to depict exotic species of flowers from outside the local area. Painting such species was worthwhile primarily because the art-buying public had developed a strong preference for images of the exotic. The great botanical centers of the time gave the artists direct access to such flowers, which the artists would freely combine in a single painting, regardless of whether the combined species occurred together in the wild, and depicted each in full bloom, regardless of whether those species bloomed at the same time in nature.

Statement: The art historian makes the point that the species of flowers these Dutch artists chose to paint were 1 largely because the species were 2 .

Select for 1 and for 2 the options that complete the statement so that it is most strongly supported by the information provided. Make only two selections, one in each column.
我选的CE，和EC有什么区别？怎么选出EC的？
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1365浏览

[Undefined]

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An unusually severe winter occurred in Europe after the continent was blanketed by a blue haze resulting from the eruption of the Laki Volcano in the European republic of Iceland in the summer of 1984.  Thus, it is evident that major eruptions cause the atmosphere to become cooler than it would be otherwise.
Which of the following statements, if true, most seriously weakens the argument above?
C选项为什么就不会有张冠李戴的问题呢，1984和1982的气候情况能一样吗，C里的火山就可以试用于原文的火山吗
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1535浏览

[Undefined]

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The rate of a certain chemical reaction is directly proportional to the square of the concentration of chemical A present and inversely proportional to the concentration of chemical B present. If the concentration of chemical B is increased by 100 percent, which of the following is closest to the percent change in the concentration of chemical A required to keep the reaction rate unchanged?
为什么这个题一定是相乘不能是相加呢？y=k1A方-k2B （k1,k2大于0 ），也满足题目说的与A方成正比与B成反比啊？但是这道题只有相乘的情况才能选出正确答案
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589浏览

[Undefined]

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Tiger beetles are such fast runners that they can capture virtually any nonflying insect.  However, when running toward an insect, the beetles intermittently stop, and then, a moment later, resume their attack.  Perhaps they cannot maintain their pace and must pause for a moment's rest; but an alternative hypothesis is that while running tiger beetles are unable to process the resulting rapidly changing visual information, and so quickly go blind and stop.
 
Which of the following, if discovered in experiments using artificially moved prey insects, would support one of the two hypotheses and undermine the other?
答案C是怎么支持一个猜想又削弱另一个猜想的？
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1367浏览

[GWD]

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The author of the passage implies that which of the following is a possible partial explanation for acquisition behavior during the 1970's and 1980's?
请解释这道题为什么不选C或E，除了正确选项B，我认为文中也正确地提到了这两个选项可以解释acquisition behavior during 1970s and 80s
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965浏览

[OG]

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The primary purpose of the passage is to
为什么选E不选B
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645浏览

[Undefined]

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Club X has more than 10 but fewer than 40 members. Sometimes the members sit at tables with 3 members at one table and 4 members at each of the other tables, and sometimes they sit at tables with 3 members at one table and 5 members at each of the other tables. If they sit at tables with 6 members at each table except one and fewer than 6 members at that one table, how many members will be at the table that has fewer than 6 members?
提问小梅老师 这道题求讲一下 我没什么思路 带入数字得的是3
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663浏览

[Undefined]

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A photography dealer ordered 60 Model X cameras to be sold for $250 each, which represents a 20 percent markup over the dealer's initial cost for each camera. Of the cameras ordered, 6 were never sold and were returned to the manufacturer for a refund of 50 percent of the dealer's initial cost. What was the dealer's approximate profit or loss as a percent of the dealer's initial cost for the 60 cameras?
请问小梅老师 这道题讲讲一下 我算的是19% 原来成本是200每个 亏了6个 每个亏100. 最后得不出答案
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155577浏览

[Undefined]

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Analytical!
请问may老师，这题该用什么思路来做？
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162686浏览

[Undefined]

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Analytical!
请问张老师，这道题为什么D不对？我有我觉得second paragraph最后一句话特别指向D
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