问答

3答疑

[Critical Reasoning]

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题目：

Because mining and refining nickel is costly, researchers have developed an alternative method for extracting nickel using Streptanthus polygaloides, a plant that absorbs and stores nickel form the soil as it grows.  The researchers incinerated a crop of Streptanthus they grew in nickel-rich soil.  By chemically extracting nickel from the ash, they produced 100 pounds of nickel per acre of land at a total cost per pound slightly above that of current mining.
 
Which of the following, if true, most strongly supports the conclusion that the use of Streptanthus to extract nickel will be commercially adopted?

选项:

A、The season in which the researchers grew Streptanthus was an unusually favorable one, with the right amount of precipitation to maximize the growth rate of Streptanthus.
B、Because lowering the concentration of nickel in the soil can make land much better for agriculture in general, a plot on which Streptanthus has been grown and harvested can be sold for substantially more than it cost.
C、More air pollution is generated for each pound of nickel produced by extracting it from Streptanthus than is generated using conventional mining and refining.
D、The land on which the researchers planted Streptanthus was unusually free of the various weeds that can compete with Streptanthus for water, nutrients, and sunlight.
E、It is extremely rare for soil to contain higher concentrations of nickel than the concentrations present in the researchers' experimental plot.

答案:

B
3答疑

[Reading Comprehension]

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文章：

    Astronomers theorize that a black hole forms when a massive object shrinks catastrophically under its own gravity, leaving only a gravitational field so strong that nothing escapes it. Astronomers must infer the existence of black holes, which are invisible, from their gravitational influence on the visible bodies surrounding them. For example, observations indicate that gas clouds in galaxy M87 are whirling unusually fast about the galaxy's center. Most astronomers believe that the large concentration of mass at the galaxy's center is a black hole whose gravity is causing the gas to whirl. A few skeptics have argued that the concentration of mass necessary to explain the speed of the whirling gas is not necessarily a black hole: the concentration in M87 might be a cluster of a billion or so dim stars.

    The same hypothesis might have been applied to the galaxy NGC 4258, but the notion of such a cluster's existing in NGC 4258 was severely undermined when astronomers measured the speed of a ring of dust and gas rotating close to the galaxy's center. From its speed, they calculated that the core's density is more than 40 times the density estimated for any other galaxy. If the center of NGC 4258 were a star cluster, the stars would be so closely spaced that collisions between individual stars would have long ago torn the cluster apart.

题目：

Which of the following, if true, would most clearly undermine the possible explanation for the whirling gas in M87 that is mentioned in the last sentence of the first paragraph?

选项:

A、The stars in a star cluster at the center of M87 could exert a strong gravitational force without tearing the cluster apart.
B、A cluster of stars at the center would preclude the existence of certain other astronomical phenomena that have been observed at the center of M87.
C、The stars within many existing galaxies, such as NGC 4258, are more closely spaced than are the stars within the core of M87.
D、Only one other galaxy has been observed to contain gas clouds whirling about its center as they do about the core of M87.
E、The gravitational force of a cluster of a billion or so dim stars would be sufficient to cause a whirling ring of gas and dust to collect around the center of a galaxy.

答案:

B
3答疑

[Critical Reasoning]

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题目：

In countries where automobile insurance includes compensation for whiplash injuries sustained in automobile accidents, reports of having suffered such injuries are twice as frequent as they are in countries where whiplash is not covered.  Presently, no objective test for whiplash exists, so it is true that spurious reports of whiplash injuries cannot be readily identified.  Nevertheless, these facts do not warrant a conclusion that has been drawn by some commentators:  that in the countries with the higher rates of reported whiplash injuries, half of the reported cases are spurious.  Clearly, in countries where automobile insurance does not include compensation for whiplash, people often have little incentive to report whiplash injuries that they actually have suffered.
 
In the argument given, the two boldfaced portions play which of the following roles?

选项:

A、The first is a claim that the argument disputes; the second is a conclusion that has been based on that claim.
B、The first is claim that has been used to support a position that the argument accepts; the second is a position that the argument rejects.
C、The first is a finding whose accuracy is evaluated in the argument; the second is the judgment reached by the argument concerning the accuracy of the finding.
D、The first is a finding whose implications are at issue in the argument; the second is the judgment reached by the argument concerning one alleged implication.
E、The first is a finding, the explanation of which is at issue in the argument; the second is an objection that has been raised against the explanation that the argument defends.

答案:

D
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[Sentence Correction]

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题目：

Like their male counterparts, women scientists are above average in terms of intelligence and creativity, but unlike men of science, their female counterparts have had to work against the grain of occupational stereotyping to enter a "man's world."

选项:

A、their female counterparts have had to work
B、their problem is working
C、one thing they have had to do is work
D、the handicap women of science have had is to work
E、women of science have had to work

答案:

E
3答疑

[Critical Reasoning]

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题目：

Previously, Autoco designed all of its cars itself and then contracted with specialized parts suppliers to build parts according to its specifications. Now it plans to include its suppliers in designing the parts they are to build. Since many parts suppliers have more designers with specialized experience than Autoco has, Autoco expects this shift to reduce the overall time and cost of the design of its next new car.

Which of the following, if true, most strongly supports Autoco’s expectation?

选项:

A、When suppliers provide their own designs, Autoco often needs to modify its overall design.
B、In order to provide designs for Autoco, several of the parts suppliers will have to add to their existing staffs of designers.
C、Parts and services provided by outside suppliers account for more than 50 percent of Autoco’s total costs.
D、When suppliers built parts according to specifications provided by Autoco, the suppliers competed to win contracts.
E、Most of Autoco’s suppliers have on hand a wide range of previously prepared parts designs that can readily be modified for a new car.

答案:

E
3答疑

[Reading Comprehension]

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文章：

Line         It is an odd but indisputable fact that the
  seventeenth-century English women who are
  generally regarded as among the forerunners of
  modern feminism are almost all identified with the
(5) Royalist side in the conflict between Royalists and
  Parliamentarians known as the English Civil Wars.
  Since Royalist ideology is often associated with the
  radical patriarchalism of seventeenth-century
  political theorist Robert Filmer—a patriarchalism
(10) that equates family and kingdom and asserts the
  divinely ordained absolute power of the king and,
  by analogy, of the male head of the household—
  historians have been understandably puzzled by the
  fact that Royalist women wrote the earliest
(15) extended criticisms of the absolute subordination
  of women in marriage and the earliest systematic
  assertions of women’s rational and moral equality
  with men. Some historians have questioned the
  facile equation of Royalist ideology with Filmerian
(20) patriarchalism; and indeed, there may have been
  no consistent differences between Royalists and
  Parliamentarians on issues of family organization
  and women’s political rights, but in that case one
  would expect early feminists to be equally divided
(25) between the two sides.
       Catherine Gallagher argues that Royalism
  engendered feminism because the ideology of
  absolute monarchy provided a transition to an
  ideology of the absolute self. She cites the example
(30) of the notoriously eccentric author Margaret
  Cavendish (1626–1673), duchess of Newcastle.
  Cavendish claimed to be as ambitious as any
  woman could be, but knowing that as a woman she
  was excluded from the pursuit of power in the real
(35) world, she resolved to be mistress of her own
  world, the “immaterial world” that any person can
  create within her own mind—and, as a writer, on
  paper. In proclaiming what she called her
  “singularity,” Cavendish insisted that she was a
(40) self-sufficient being within her mental empire, the
  center of her own subjective universe rather than a
  satellite orbiting a dominant male planet. In
  justifying this absolute singularity, Cavendish
  repeatedly invoked the model of the absolute
(45) monarch, a figure that became a metaphor for the
  self-enclosed, autonomous nature of the individual
  person. Cavendish’s successors among early
  feminists retained her notion of woman’s sovereign
  self, but they also sought to break free from the
(50) complete political and social isolation that her
  absolute singularity entailed.


题目：

The passage suggests which of the following about the seventeenth-century English women mentioned in line 2?

选项:

A、Their status as forerunners of modern feminism is not entirely justified.
B、They did not openly challenge the radical patriarchalism of Royalist Filmerian ideology.
C、Cavendish was the first among these women to criticize women’s subordination in marriage and assert women’s equality with men.
D、Their views on family organization and women’s political rights were diametrically opposed to those of both Royalist and Parliamentarian ideology.
E、Historians would be less puzzled if more of them were identified with the Parliamentarian side in the English Civil Wars.

答案:

E
3答疑

[Critical Reasoning]

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文章：

In countries where automobile insurance includes compensation for whiplash injuries sustained in automobile accidents, reports of having suffered such injuries are twice as frequent as they are in countries where whiplash is not covered. Presently, no objective test for whiplash exists, so it is true that spurious reports of whiplash injuries cannot be readily identified. Nevertheless, these facts do not warrant the conclusion drawn by some commentators, that in the countries with the higher rates of reported whiplash injuries, half of the reported cases are spurious. Clearly, in countries where automobile insurance does not include compensation for whiplash, people often have little incentive to report whiplash injuries that they actually have suffered.

题目：

In the argument given, the two boldfaced portions play which of the following roles?

选项:

A、The first is a claim that the argument disputes; the second is a conclusion that has been based on that claimThe first is a claim that has been used to support a conclusion that the argument accepts; the second is that conclusion. 
B、The first is evidence that has been used to support a conclusion for which the argument provides further evidence; the second is the main conclusion of the argument.
C、The first is a finding whose implications are at issue in the argument; the second is a claim presented in order to argue against deriving certain implications from that fi nding.
D、The first is a finding whose accuracy is evaluated in the argument; the second is evidence presented to establish that the fi nding is accurate.

答案:

D
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[Sentence Correction]

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题目：

Visitors to the park have often looked up into the leafy canopy and saw monkeys sleeping on the branches, whose arms and legs hang like socks on a clothesline.

选项:

A、saw monkeys sleeping on the branches, whose arms and legs hang 
B、saw monkeys sleeping on the branches, whose arms and legs were hanging 
C、saw monkeys sleeping on the branches, with arms and legs hanging 
D、seen monkeys sleeping on the branches, with arms and legs hanging 
E、seen monkeys sleeping on the branches, whose arms and legs have hung

答案:

D
3答疑

[Reading Comprehension]

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文章：

Line         Among the myths taken as fact by the
  environmental managers of most corporations is
  the belief that environmental regulations affect all
  competitors in a given industry uniformly. In reality,
(5) regulatory costs—and therefore compliance—
  fall unevenly, economically disadvantaging some
  companies and benefiting others. For example, a
  plant situated near a number of larger
  noncompliant competitors is less likely to attract
(10) the attention of local regulators than is an isolated
  plant, and less attention means lower costs.
       Additionally, large plants can spread compliance
  costs such as waste treatment across a larger
  revenue base; on the other hand, some smaller
(15) plants may not even be subject to certain
  provisions such as permit or reporting
  requirements by virtue of their size. Finally, older
  production technologies often continue to generate
  toxic wastes that were not regulated when the
(20) technology was first adopted. New regulations
  have imposed extensive compliance costs on
  companies still using older industrial coal-fired
  burners that generate high sulfur dioxide and
  nitrogen oxide outputs, for example, whereas new
(25) facilities generally avoid processes that would
  create such waste products. By realizing that they
  have discretion and that not all industries are
  affected equally by environmental regulation,
  environmental managers can help their companies
(30) to achieve a competitive edge by anticipating
  regulatory pressure and exploring all possibilities for
  addressing how changing regulations will affect their
  companies specifically.


题目：

The primary purpose of the passage is to

选项:

A、address a widespread environmental management problem and suggest possible solutions
B、illustrate varying levels of compliance with environmental regulation among different corporations
C、describe the various alternatives to traditional methods of environmental management
D、advocate increased corporate compliance with environmental regulation
E、correct a common misconception about the impact of environmental regulations

答案:

E
3答疑

[Data Sufficiency]

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题目：

If 2 different representatives are to be selected at random from a group of 10 employees

选项:

答案:

E
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[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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[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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[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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[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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2989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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[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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[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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[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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[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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