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[Problem Solving]

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题目：

A certain right triangle has sides of length x , y , and z, where. If the area of this triangular region is 1, which of the following indicates all of the possible values of y   ?

选项:

A、
B、
C、
D、
E、

答案:

A
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[Problem Solving]

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题目：

Yesterday each of the 35 members of a certain task force spent some time working on project P .  The graph shows the number of hours and the number of members who spent that number of hours working on project P  yesterday.  What was the median number of hours that the members of the task force spent working on project P  yesterday?

选项:

A、2
B、3
C、4
D、5
E、6

答案:

E
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[Critical Reasoning]

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题目：

Economist:  Tropicorp, which constantly seeks profitable investment opportunities, has been buying and clearing sections of tropical forest for cattle ranching, although pastures newly created there become useless for grazing after just a few years.  The company has not gone into rubber tapping, even though greater profits can be made from rubber tapping, which leaves the forest intact.  Thus, some environmentalists conclude that Tropicorp has not acted wholly out of economic self-interest.  However, these environmentalists are probably wrong.  The initial investment required for a successful rubber-tapping operation is larger than that needed for a cattle ranch.  Furthermore, there is a shortage of workers employable in rubber-tapping operations, and finally, taxes are higher on profits from rubber tapping than on profits from cattle ranching.
 
In the economist's argument, the two boldfaced portions play which of the following roles?

选项:

A、The first supports the conclusion of the economist's argument; the second calls that conclusion into question.
B、The first states the conclusion of the economist's argument; the second supports that conclusion.
C、The first supports the environmentalists' conclusion; the second states that conclusion.
D、The first states the environmentalists' conclusion; the second states the conclusion of the economist's argument.
E、Each supports the conclusion of the economist's argument.

答案:

C
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[Reading Comprehension]

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文章：

Line         Because the framers of the United States
  Constitution (written in 1787) believed that protecting
  property rights relating to inventions would encourage
  the new nation’s economic growth, they gave
(5) Congress—the national legislature—a constitutional
  mandate to grant patents for inventions. The resulting
  patent system has served as a model for those in
  other nations. Recently, however, scholars have
  questioned whether the American system helped
(10) achieve the framers’ goals. These scholars have
  contended that from 1794 to roughly 1830, American
  inventors were unable to enforce property rights
  because judges were “antipatent” and routinely
  invalidated patents for arbitrary reasons. This
(15) argument is based partly on examination of court
  decisions in cases where patent holders (“patentees”)
  brought suit alleging infringement of their patent
  rights. In the 1820s, for instance, 75 percent
  of verdicts were decided against the patentee.
(20) The proportion of verdicts for the patentee began to
  increase in the 1830s, suggesting to these scholars
  that judicial attitudes toward patent rights began
  shifting then.
       Not all patent disputes in the early nineteenth
(25) century were litigated, however, and litigated
  cases were not drawn randomly from the
  population of disputes. Therefore the rate of
  verdicts in favor of patentees cannot be used
  by itself to gauge changes in judicial attitudes
(30) or enforceability of patent rights. If early judicial
  decisions were prejudiced against patentees, one
  might expect that subsequent courts—allegedly
  more supportive of patent rights—would reject
  the former legal precedents. But pre-1830
(35) cases have been cited as frequently as later
  decisions, and they continue to be cited today,
  suggesting that the early decisions, many of
  which clearly declared that patent rights were
  a just recompense for inventive ingenuity,
(40) provided a lasting foundation for patent law.
  The proportion of judicial decisions in favor of
  patentees began to increase during the 1830s
  because of a change in the underlying population
  of cases brought to trial. This change was partly
(45) due to an 1836 revision to the patent system:
  an examination procedure, still in use today, was
  instituted in which each application is scrutinized
  for its adherence to patent law. Previously,
  patents were automatically granted upon payment
(50) of a $30 fee.


题目：

It can be inferred from the passage that the author and the scholars referred to in line 21 disagree about which of the following aspects of the patents defended in patent-infringement suits before 1830 ?

选项:

A、Whether the patents were granted for inventions that were genuinely useful
B、Whether the patents were actually relevant to the growth of the United States economy
C、Whether the patents were particularly likely to be annulled by judges
D、Whether the patents were routinely invalidated for reasons that were arbitrary
E、Whether the patents were vindicated at a significantly lower rate than patents in later suits

答案:

D
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[Critical Reasoning]

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题目：

Which of the following most logically completes the passage?

According to the last pre-election poll in Whippleton, most voters believe that the three problems government needs to address, in order of importance, are pollution, crime, and unemployment. Yet in the election, candidates from parties perceived as strongly against pollution were defeated, while those elected were all from parties with a history of opposing legislation designed to reduce pollution. These results should not be taken to indicate that the poll was inaccurate, however, since __________.

选项:

答案:

D
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[Critical Reasoning]

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题目：

Newspaper editors should not allow reporters to write the headlines for their own stories. The reason for this is that, while the headlines that reporters themselves write are often clever, what typically makes them clever is that they allude to little-known information that is familiar to the reporter but that never appears explicitly in the story itself.

Which of the following, if true, most strengthens the argument?

选项:

答案:

E
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[Sentence Correction]

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题目：

The bank holds$3 billion in loans that are seriously delinquent or in such trouble that they do not expect payments when due.

选项:

A、they do not expect payments whenit does not expect payments when it is
B、it does not expect payments to be made when they are
C、payments are not to be expected to be paid when
D、payments are not expected to be paid when they will be

答案:

C
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[Sentence Correction]

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题目：

Dr. Tonegawa won the Nobel Prize for discovering how the body can constantly change its genes to fashion a seeming unlimited number of antibodies, each specifically targeted at an invading microbe or foreign substance.

选项:

A、seeming unlimited number of antibodies, each specifically targeted at
B、seeming unlimited number of antibodies, each targeted specifically to
C、seeming unlimited number of antibodies, all specifically targeted at
D、seemingly unlimited number of antibodies, all of them targeted specifically to
E、seemingly unlimited number of antibodies, each targeted specifically at

答案:

E
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[Critical Reasoning]

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题目：

Manufacturers issue cents-off coupons to get consumers to try their brand of product with the hope that the consumers who try their brand will switch their brand loyalty.  So in the initial marketing of their new brand X, Hartman Industries should issue cents-off coupons, thereby attracting a large segment of potential consumers as loyal customers.
 
Which of the following, if true, casts the most serious doubt on the likelihood that the marketing strategy recommended above will have the result that is claimed?

选项:

A、Many consumers are unlikely to try new brands of products unless offered an inducement to do so.
B、The consumers whose purchases are strongly influenced by cents-off coupons tend not to become loyal customers of any particular brand.
C、Many grocery stores attract customers by doubling the face value of manufacturer's coupons.
D、Typically less than one-third of the coupons issued by a manufacturer are redeemed by consumers.
E、A marketing campaign that uses cents-off coupons is most effective when combined with a television advertising campaign.

答案:

B
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[Sentence Correction]

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题目：

An international group of more than 2,000 scientists project an average global warming that will be between 1.8 and 6.3 degrees Fahrenheit by the year 2000.

选项:

A、project an average global warming that will be between 1.8 and
B、project an average global warming to be from 1.8 to
C、project global warming that will average between 1.8 and
D、projects global warming to average from 1.8 to
E、projects an average global warming of between 1.8 and

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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[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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