问答

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[Sentence Correction]

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题目：

According to United States census data, while there was about one-third of mothers with young children working outside the home in 1975, in 2000,almost two-thirds of those mothers were employed outside the home.

选项:

A、while there was about one-third of mothers with young children working outside the home in 1975, in 2000, almost two-thirds of those mothers were employed outside the home.
B、there were about one-third of mothers with young children who worked outside the home in 1975; in 2000, almost two-thirds of those mothers were employed outside the home
C、in 1975 about one-third of mothers with young children worked outside the home; in 2000, almost two-thirds of such mothers were employed outside the home
D、even though in 1975 there were about one-third of mothers with young children who worked outside the home, almost two-thirds of such mothers were employed outside the home in 2000
E、with about one-third of mothers with young children working outside the home in 1975, almost two-thirds of such mothers were employed outside the home in 2000

答案:

C
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[Critical Reasoning]

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题目：

A prominent investor who holds a large stake in the Burton Tool Company has recently claimed that the company is mismanaged, citing as evidence the company's failure to slow production in response to a recent rise in its inventory of finished products.  It is doubtful whether an investor's sniping at management can ever be anything other than counterproductive, but in this case it is clearly not justified.  It is true that an increased inventory of finished products often indicates that production is outstripping demand, but in Burton's case it indicates no such thing.  Rather, the increase in inventory is entirely attributable to products that have already been assigned to orders received from customers.
 
In the argument given, the two boldfaced portions play which of the following roles?

选项:

A、The first states the position that the argument as a whole opposes; the second provides evidence to undermine the support for the position being opposed.
B、The first states the position that the argument as a whole opposes; the second is evidence that has been used to support the position being opposed.
C、The first states the position that the argument as a whole opposes; the second states the conclusion of the argument as a whole.
D、The first is evidence that has been used to support a position that the argument as a whole opposes; the second provides information to undermine the force of that evidence.
E、The first is evidence that has been used to support a position that the argument as a whole opposes; the second states the conclusion of the argument as a whole.

答案:

C
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[Critical Reasoning]

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文章：

The average hourly wage of television assemblers in Vernland has long been signifi cantly lower than that in neighboring Borodia. Since Borodia dropped all tariffs on Vernlandian televisions three years ago, the number of televisions sold annually in Borodia has not changed. However, recent statistics show a drop in the number of television assemblers in Borodia. Therefore, updated trade statistics will probably indicate that the number of televisions Borodia imports annually from Vernland has increased.

题目：

Which of the following is an assumption on which the argument depends?

选项:

A、The number of television assemblers in Vernland has increased by at least as much as the number of television assemblers in Borodia has decreased. Televisions assembled in Vernland have features that televisions assembled in Borodia do not have
B、The average number of hours it takes a Borodian television assembler to assemble a television has not decreased signifi cantly during the past three years. 
C、The number of televisions assembled annually in Vernland has increased signifi cantly during the past three years
D、The difference between the hourly wage of television assemblers in Vernland and the hourly wage of television assemblers in Borodia is likely to decrease in the next few years. 

答案:

C
3答疑

[Reading Comprehension]

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文章：

Line         Frazier and Mosteller assert that medical research
  could be improved by a move toward larger, simpler
  clinical trials of medical treatments. Currently,
  researchers collect far more background information
(5) on patients than is strictly required for their trials—
  substantially more than hospitals collect—thereby
  escalating costs of data collection, storage, and
  analysis. Although limiting information collection
  could increase the risk that researchers will overlook
(10) facts relevant to a study, Frazier and Mosteller
  contend that such risk, never entirely eliminable from
  research, would still be small in most studies. Only
  in research on entirely new treatments are new and
  unexpected variables likely to arise.
(15)      Frazier and Mosteller propose not only that
  researchers limit data collection on individual
  patients but also that researchers enroll more
  patients in clinical trials, thereby obtaining a more
  representative sample of the total population with
(20) the disease under study. Often researchers restrict
  study participation to patients who have no ailments
  besides those being studied. A treatment judged
  successful under these ideal conditions can then be
  evaluated under normal conditions. Broadening the
(25) range of trial participants, Frazier and Mosteller
  suggest, would enable researchers to evaluate a
  treatment’s efficacy for diverse patients under various
  conditions and to evaluate its effectiveness for
  different patient subgroups. For example, the value
(30) of a treatment for a progressive disease may vary
  according to a patient’s stage of disease. Patients’
  ages may also affect a treatment’s efficacy.


题目：

It can be inferred from the passage that a study limited to patients like those mentioned in lines 20–22 would have which of the following advantages over the kind of study proposed by Frazier and Mosteller?

选项:

A、It would yield more data and its findings would be more accurate.
B、It would cost less in the long term, though it would be more expensive in its initial stages.
C、It would limit the number of variables researchers would need to consider when evaluating the treatment under study.
D、It would help researchers to identify subgroups of patients with secondary conditions that might also be treatable.
E、It would enable researchers to assess the value of an experimental treatment for the average patient.

答案:

C
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：

Comparable worth, as a standard applied to eliminate inequities in pay, insists that the values of certain tasks performed in dissimilar jobs can be compared.  In the last decade, this approach has become a critical social policy issue, as large numbers of private-sector firms and industries as well as federal, state, and local governmental entities have adopted comparable worth policies or begun to consider doing so.
 
This widespread institutional awareness of comparable worth indicates increased public awareness that pay inequities--that is, situations in which pay is not "fair" because it does not reflect the true value of a job--exist in the labor market.  However, the question still remains:  have the gains already made in pay equity under comparable worth principles been of a precedent-setting nature or are they mostly transitory, a function of concessions made by employers to mislead female employees into believing that they have made long-term pay equity gains?
 
Comparable worth pay adjustments are indeed precedent-setting.  Because of the principles driving them, other mandates that can be applied to reduce or eliminate unjustified pay gaps between male and female workers have not remedied perceived pay inequities satisfactorily for the litigants in cases in which men and women hold different jobs.  But whenever comparable worth principles are applied to pay schedules, perceived unjustified pay differences are eliminated.  In this sense, then, comparable worth is more comprehensive than other mandates, such as the Equal Pay Act of 1963 and Title VII of the Civil Rights Act of 1964.  Neither compares tasks in dissimilar jobs (that is, jobs across occupational categories) in an effort to determine whether or not what is necessary to perform these tasks--know-how, problem-solving, and accountability--can be quantified in terms of its dollar value to the employer.  Comparable worth, on the other hand, takes as its premise that certain tasks in dissimilar jobs may require a similar amount of training, effort, and skill; may carry similar responsibility; may be carried on in an environment having a similar impact upon the worker; and may have a similar dollar value to the employer.

题目：

It can be inferred from the passage that application of "other mandates" (see highlighted text) would be unlikely to result in an outcome satisfactory to the female employees in which of the following situations? 

选项:

A、 I only
B、 II only
C、 III only
D、 I and II only
E、 I and III only

答案:

B
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[Critical Reasoning]

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题目：

Historian:  In the Drindian Empire, censuses were conducted annually to determine the population of each village.  Village census records for the last half of the 1600's are remarkably complete.  This very completeness makes one point stand out; in five different years, villages overwhelmingly reported significant population declines.  Tellingly, each of those five years immediately followed an increase in a certain Drindian tax.  This tax, which was assessed on villages, was computed by the central government using the annual census figures.  Obviously, whenever the tax went up, villages had an especially powerful economic incentive to minimize the number of people they recorded; and concealing the size of a village's population from government census takers would have been easy.  Therefore, it is reasonable to think that the reported declines did not happen.
 
In the historian's argument, the two portions in boldface play which of the following roles?

选项:

A、The first supplies a context for the historian's argument; the second acknowledges a consideration that has been used to argue against the position the historian seeks to establish.
B、The first presents evidence to support the position that the historian seeks to establish; the second acknowledges a consideration that has been used to argue against that position.
C、The first provides a context for certain evidence that supports the position that the historian seeks to establish; the second is that position.
D、The first is a position for which the historian argues; the second is an assumption that serves as the basis of that argument.
E、The first is an assumption that the historian explicitly makes in arguing for a certain position; the second acknowledges a consideration that calls that assumption into question.

答案:

C
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[Reading Comprehension]

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文章：

    Diamonds are almost impossible to detect directly because they are so rare: very rich kimberlite pipes, the routes through which diamonds rise, may contain only three carats of diamonds per ton of kimberlite. Kimberlite begins as magma in Earth's mantle (the layer between the crust and the core). As the magma smashes through layers of rock, it rips out debris, creating a mix of liquid and solid material. Some of the solid material it brings up may come from a so-called diamond-stability field, where conditions of pressure and temperature are conducive to the formation of diamonds. If diamonds are to survive, though, they must shoot toward Earth's surface quickly. Otherwise, they revert to graphite or burn. Explorers seeking diamonds look for specks of "indicator minerals" peculiar to the mantle but carried up in greater quantities than diamonds and eroded out of kimberlite pipes into the surrounding land. The standard ones are garnets, chromites, and ilmenites. One can spend years searching for indicators and tracing them back to the pipes that are their source; however, 90 percent of kimberlite pipes found this way are barren of diamonds, and the rest are usually too sparse to mine.

    In the 1970's the process of locating profitable pipes was refined by focusing on the subtle differences between the chemical signatures of indicator minerals found in diamond-rich pipes as opposed to those found in barren pipes. For example, G10 garnets, a type of garnet typically found in diamond-rich pipes, are lower in calcium and higher in chrome than garnets from barren pipes. Geo-chemists John Gurney showed that garnets with this composition were formed only in the diamond-stability field; more commonly found versions came from elsewhere in the mantle. Gurney also found that though ilmenites did not form in the diamond-stability field, there was a link useful for prospectors: when the iron in ilmenite was highly oxidized, its source pipe rarely contained any diamonds. He reasoned that iron took on more or less oxygen in response to conditions in the kimberlitic magma itself—mainly in response to heat and the available oxygen. When iron became highly oxidized, so did diamonds; that is, they vaporized into carbon dioxide.

题目：

The passage suggests that the presence of G10 garnet in a kimberlite pipe indicates that

选项:

A、the pipe in which the garnet is found has a 90% chance of containing diamonds
B、the levels of calcium and chrome in the pipe are conducive to diamond formation
C、the pipe passed through a diamond-stability field and thus may contain diamonds
D、any diamonds the pipe contains would not have come from the diamond-stability field
E、the pipe's temperature was so high that it oxidized any diamonds the pipe might have contained

答案:

C
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[Reading Comprehension]

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文章：

The view has prevailed for the better part of the twentieth century that small firms do not perform an important role in Western economies.  Official policies in many countries have favored large units of production because there were strong reasons to believe that large firms were superior to small firms in virtually every aspect of economic performance--productivity, technological progress, and job security and compensation.  However, in the 1970s, evidence began to suggest that small firms in some countries were outperforming their larger counterparts.  Perhaps the best example of this trend was in the steel industry, where new firms entered the market in the form of "mini-mills," and small-firm employment expanded, while many large companies shut down plants and reduced employment.  Although no systematic evidence exists to determine unequivocally whether smaller units of production are as efficient as large firms or are, in fact, more efficient, some researchers have concluded that the accumulated evidence to date indicates that small firms are at least not burdened with an inherent size disadvantage.
 
Thus, an alternative view has emerged in the economics literature, arguing that small firms make several important contributions to industrial markets.  First, small firms are often the source of the kind of innovative activity that leads to technological change.  Small firms generate market turbulence that creates additional dimensions of competition, and they also promote international competition through newly created niches.  Finally, small firms in recent years have generated the preponderant share of new jobs.
 
However, empirical knowledge about the relative roles of large and small firms is generally based upon anecdotal evidence and case studies, and such evidence has proved inadequate to answer major questions concerning the role of small firms across various industries and nations.  An additional difficulty is that it is not obvious what criteria one should use to distinguish small firms from large ones.  While a "small firm" is often defined as an enterprise with fewer than 500 employees, research studies of small firms use a wide variety of definitions.

题目：

The passage is primarily concerned with

选项:

A、dismissing a challenge to a traditional viewpoint
B、suggesting a new solution to a long-standing problem
C、resolving a conflict between two competing viewpoints
D、discussing the emergence of an alternative viewpoint
E、defending an alternative viewpoint against possible counterevidence

答案:

D
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[Sentence Correction]

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题目：

In the United States, while the number of foreign-born residents and their children is higher than ever, the percentage of the population they represent is not; in 1910 this group made up 35 percent of the population when compared to 20 percent in 2000.

选项:

A、population when compared to 20 percent in 2000
B、population as compared to 2000, when it was 20 percent
C、population, comparing it with 20 percent in 2000
D、population, unlike 2000, with 20 percent
E、population, compared with 20 percent in 2000

答案:

E
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790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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2404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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2634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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922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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2114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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1457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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945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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979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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230043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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237167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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