问答

3答疑

[Reading Comprehension]

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文章：

Line        When asteroids collide, some collisions cause
 an asteroid to spin faster; others slow it down. If
 asteroids are all monoliths—single rocks—undergoing
 random collisions, a graph of their rotation rates
(5)should show a bell-shaped distribution with statistical
 “tails” of very fast and very slow rotators. If asteroids
 are rubble piles, however, the tail representing the
 very fast rotators would be missing, because any
 loose aggregate spinning faster than once every few
(10)hours (depending on the asteroid’s bulk density)
 would fly apart. Researchers have discovered that
 all but five observed asteroids obey a strict limit on
 rate of rotation. The exceptions are all smaller than
 200 meters in diameter, with an abrupt cutoff for
(15)asteroids larger than that.
      The evident conclusion—that asteroids larger than
 200 meters across are multicomponent structures
 or rubble piles—agrees with recent computer modeling
 of collisions, which also finds a transition at that
(20)diameter. A collision can blast a large asteroid to bits,
 but after the collision those bits will usually move
 slower than their mutual escape velocity. Over several
 hours, gravity will reassemble all but the fastest
 pieces into a rubble pile. Because collisions among
(25)asteroids are relatively frequent, most large bodies
 have already suffered this fate. Conversely, most
 small asteroids should be monolithic, because impact
 fragments easily escape their feeble gravity.


题目：

The passage implies which of the following about the five asteroids mentioned in line 12?

选项:

答案:

C
3答疑

[Reading Comprehension]

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文章：

    Many economists believe that a high rate of business savings in the United States is a necessary precursor to investment, because business savings, as opposed to personal savings, comprise almost three-quarters of the national savings rate, and the national savings rate heavily influences the overall rate of business investment. These economists further postulate that real interest rates-the difference between the rates charged by lenders and the inflation rates-will be low when national savings exceed business investment (creating a savings surplus),and high when national savings fall below the level of business investment(creating a savings deficit ).

    However, during the 1960's real interest rates were often higher when the national savings surplus was large. Counter intuitive behavior also occurred when real interest rates skyrocketed from 2 percent in 1980 to 7 percent in 1982,even though national savings and investments were roughly equal throughout the period. Clearly, real interest rates respond to influences other than the savings/investment nexus. Indeed, real interest rates may themselves influence swings in the savings and investment rates. As real interest rates shot up after 1979, foreign investors poured capital into the United States, the price of domestic goods increased prohibitively abroad, and the price of foreign-made goods became lower in the United States. As a result, domestic economic activity and the ability of businesses to save and invest were restrained.

题目：

The passage is primarily concerned with

选项:

A、contrasting trends in two historical periods
B、presenting evidence that calls into question certain beliefs
C、explaining the reasons for a common phenomenon
D、criticizing evidence offered in support of a well-respected belief
E、comparing conflicting interpretations of a theory

答案:

B
3答疑

[Critical Reasoning]

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文章：

Studies in restaurants show that the tips left by customers who pay their bill in cash tend to be larger when the bill is presented on a tray that bears a creditcard logo. Consumer psychologists hypothesize that simply seeing a credit-card logo makes many creditcard holders willing to spend more because it reminds them that their spending power exceeds the cash they have immediately available.

题目：

Which of the following, if true, most strongly supports the psychologists’ interpretation of the studies?

选项:

A、The effect noted in the studies is not limited to patrons who have credit cards. Patrons who are under fi nancial pressure from their credit-card obligations tend to tip less when presented with a restaurant bill on a tray with a credit-card logo than when the tray has no logo.
B、In virtually all of the cases in the studies, the patrons who paid bills in cash did not possess credit cards
C、In general, restaurant patrons who pay their bills in cash leave larger tips than do those who pay by credit card
D、The percentage of restaurant bills paid with a given brand of credit card increases when that credit card's logo is displayed on the tray with which the bill is presented. 

答案:

B
3答疑

[Reading Comprehension]

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文章：

    Firms traditionally claim that they downsize (i.e., make permanent personnel cuts) for economic reasons, laying off supposedly unnecessary staff in an attempt to become more efficient and competitive. Organization theory would explain this reasoning as an example of the "economic rationality" that it assumes underlies all organizational activities. There is evidence that firms believe they are behaving rationally whenever they downsize; yet recent research has shown that the actual economic effects of downsizing are often negative for firms. Thus, organization theory cannot adequately explain downsizing; non-economic factors must also be considered.

    One such factor is the evolution of downsizing into a powerful business myth: managers simply believe that downsizing is efficacious. Moreover, downsizing nowadays is greeted favorably by the business press; the press often refers to soaring stock prices of downsizing firms (even though research shows that stocks usually rise only briefly after downsizing and then suffer a prolonged decline).

    Once viewed as a sign of desperation, downsizing is now viewed as a signal that firms are serious about competing in the global marketplace; such signals are received positively by key actors-financial analysts, consultants, shareholders who supply firms with vital organizing resources. Thus, even if downsizers do not become economically more efficient, downsizing's mythic properties give them added prestige in the business community, enhancing their survival prospects.

题目：

The passage suggests which of the following about the claim that a firm will become more efficient and competitive by downsizing?

选项:

A、Few firms actually believe this claim to be true.
B、Fewer firms have been making this claim in recent years.
C、This claim contradicts the basic assumption of organization theory.
D、This claim is called into question by certain recent research.
E、This claim is often treated with skepticism by the business press.

答案:

D
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[Sentence Correction]

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题目：

Despite the increasing number of women graduating from law school and passing bar examinations, the proportion of judges and partners at major law firms who are women have not risen to a comparable extent.

选项:

A、the proportion of judges and partners at major law firms who are women have not risen to a comparable extent
B、the proportion of women judges and partners at major law firms have not risen comparably
C、the proportion of judges and partners at major law firms who are women has not risen comparably
D、yet the proportion of women judges and partners at major law firms has not risen to a comparable extent
E、yet the proportion of judges and partners at major law firms who are women has not risen comparably

答案:

C
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[Critical Reasoning]

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题目：

Sascha: The attempt to ban parliament's right to pass directed-spending bills—bills that contain provisions specifically funding the favorite projects of some powerful politicians—is antidemocratic. Our nation's constitution requires that money be drawn from our treasury only when so stipulated by laws passed by parliament, the branch of government most directly representative of the citizens. This requirement is based on the belief that exercising the power to spend public resources involves the ultimate exercise of state authority and that therefore _________.

Which of the following most logically completes Sascha's argument?

选项:

A、designating funding specifically for the favorite projects of some powerful politicians should be considered antidemocratic
B、the right to exercise such a power should belong exclusively to the branch of government most directly representative of the citizens
C、exercising the power to spend public resources is in most cases—but not all—protected by the constitution
D、modifications to any spending bills should be considered expenditures authorized by law
E、only officials who are motivated by concerns for reelection should retain that power

答案:

B
3答疑

[Reading Comprehension]

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文章：

Colonial historian David Allen's intensive study of five communities in seventeenth-century Massachusetts is a model of meticulous scholarship on the detailed microcosmic level, and is convincing up to a point.  Allen suggests that much more coherence and direct continuity existed between English and colonial agricultural practices and administrative organization than other historians have suggested.  However, he overstates his case with the declaration that he has proved "the remarkable extent to which diversity in New England local institutions was directly imitative of regional differences in the mother country."
 
Such an assertion ignores critical differences between seventeenth-century England and New England.  First, England was overcrowded and land-hungry; New England was sparsely populated and labor-hungry.  Second, England suffered the normal European rate of mortality; New England, especially in the first generation of English colonists, was virtually free from infectious diseases.  Third, England had an all-embracing state church; in New England membership in a church was restricted to the elect.  Fourth, a high proportion of English villagers lived under paternalistic resident squires; no such class existed in New England.  By narrowing his focus to village institutions and ignoring these critical differences, which studies by Greven, Demos, and Lockridge have shown to be so important, Allen has created a somewhat distorted picture of reality.
 
Allen's work is a rather extreme example of the "country community" school of seventeenth-century English history whose intemperate excesses in removing all national issues from the history of that period have been exposed by Professor Clive Holmes.  What conclusion can be drawn, for example, from Allen's discovery that Puritan clergy who had come to the colonies from East Anglia were one-third to one-half as likely to return to England by 1660 as were Puritan ministers from western and northern England?  We are not told in what way, if at all, this discovery illuminates historical understanding.  Studies of local history have enormously expanded our horizons, but it is a mistake for their authors to conclude that village institutions are all that mattered, simply because their functions are all that the records of village institutions reveal.

题目：

It can be inferred from the passage that the author of the passage considers Allen's "discovery" (see highlighted text) to be

选项:

A、already known to earlier historians
B、based on a logical fallacy
C、improbable but nevertheless convincing
D、an unexplained, isolated fact
E、a new, insightful observation

答案:

D
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[Sentence Correction]

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题目：

Although a number of excellent studies narrate the development of domestic technology and its impact on housewifery, these works do not discuss the contributions of the women employed by manufacturers and utility companies as product demonstrators and publicists, who initially promoted new and unfamiliar technology to female consumers.

选项:

A、by manufacturers and utility companies as product demonstrators and publicists,
B、to be product demonstrators and publicists by manufacturers and utility companies,
C、to demonstrate and publicize their products by manufacturers and utility companies
D、by manufacturers and utility companies to be demonstrators and publicists of their products
E、by manufacturers and utility companies to demonstrate and publicize their products

答案:

A
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[Problem Solving]

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题目：

Reid took 1 hour to cycle from his home to his college.

The graph shows Reed's distance from his college during
That hour. Reid's average speed for the last 15 minutes
Of the hour was how many kifometers per hour greater
Than his average speed for the first 45 minutes?

选项:

A、3
B、4
C、5
D、6
E、7

答案:

3答疑

[Problem Solving]

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题目：

What is the greatest prime factor of 2100 - 296?

选项:

A、2
B、3
C、5
D、7
E、11

答案:

C
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963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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2796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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3072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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1048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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2403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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1665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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[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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1139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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261554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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268671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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