问答

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[Critical Reasoning]

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题目：

The air quality board recently informed Coffee Roast, a small coffee roasting firm, of a complaint regarding the smoke from its roaster. Recently enacted air quality regulations require machines roasting more than 10 pounds of coffee to be equipped with expensive smoke-dissipating afterburners. The firm, however, roasts only 8 pounds of coffee at a time. Nevertheless, the company has decided to purchase and install an afterburner.

Which of the following, if true, most strongly supports the firm’s decision?

选项:

A、Until settling on the new air quality regulations, the board had debated whether to require afterburners for machines roasting more than 5 pounds of coffee at a time.
B、Coffee roasted in a machine equipped with an afterburner has its flavor subtly altered.
C、The cost to the firm of an afterburner is less than the cost of replacing its roaster with a smaller one.
D、Fewer complaints are reported in areas that maintain strict rules regarding afterburners.
E、The firm has reason to fear that negative publicity regarding the complaints could result in lost sales.

答案:

E
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[Sentence Correction]

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题目：

Next month, state wildlife officials are scheduled to take over the job of increasing the wolf population in the federally designated recovery area, the number of which will however ultimately be dictated by the number of prey in the area.

选项:

答案:

B
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[Sentence Correction]

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题目：

Gusty westerly winds will continue to usher in a seasonably cool air mass into the region, as a broad area of high pressure will build and bring fair and dry weather for several days.

选项:

A、to usher in a seasonably cool air mass into the region, as a broad area of high pressure will build and
B、ushering in a seasonably cool air mass into the region and a broad area of high pressure will build that
C、to usher in a seasonably cool air mass to the region, a broad area of high pressure building, and
D、ushering a seasonably cool air mass in the region, with a broad area of high pressure building and
E、to usher a seasonably cool air mass into the region while a broad area of high pressure builds, which will

答案:

E
3答疑

[Problem Solving]

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题目：

An equilateral triangle that has an area of 9 3^1/2 is inscribed in a circle. What is the area of the circle?

选项:

A、6pi
B、9pi
C、12 pi
D、9pi 3^1/2
E、18pi 3^1/2

答案:

C
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[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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[Problem Solving]

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题目：

Six cards numbered from 1 to 6 are placed in an empty bowl. First one card is drawn and then put back into the bowl; then a second card is drawn.  If the cards are drawn at random and if the sum of the numbers on the cards is 8, what is the probability that one of the two cards drawn is numbered 5 ?

选项:

A、1/6
B、1/5
C、1/3
D、2/5
E、2/3

答案:

D
3答疑

[Critical Reasoning]

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题目：

Astronomer:  Observations of the Shoemaker-Levi comet on its collision course with Jupiter showed that the comet broke into fragments before entering Jupiter's atmosphere in 1994, but they did not show how big those fragments were.  Nevertheless, some indication of their size can be inferred from spectrographic analyses of Jupiter's outer atmosphere.  After the fragments' entry, these analyses revealed unprecedented traces of sulfur.  The fragments themselves almost certainly contained no sulfur, but astronomers believe that the cloud layer below Jupiter's outer atmosphere does contain sulfur.  Since sulfur would have seeped into the outer atmosphere if comet fragments had penetrated this cloud layer, it is likely that some of the fragments were at least large enough to have passed through Jupiter's outer atmosphere without being burned up.
 
In the astronomer's argument, the two portions in boldface play which of the following roles?

选项:

A、The first is a claim that the astronomer seeks to show is true; the second acknowledges a consideration that weighs against the truth of that claim.
B、The first is a claim that the astronomer seeks to show is true; the second provides evidence in support of the truth of that claim.
C、The first and the second are each considerations advanced in support of the conclusion of the argument.
D、The first provides evidence in support of the conclusion of the argument; the second is that conclusion.
E、The first is a circumstance for which the astronomer seeks to provide an explanation; the second acknowledges a consideration that weighs against the explanation provided by the astronomer.

答案:

C
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[Data Sufficiency]

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题目：

An integer greater than 1 that is not prime is called composite.  If the two-digit integer n is greater than 20, is n composite?
(1)     The tens digit of n is a factor of the units digit of n.
(2)     The tens digit of n is 2.

选项:

答案:

A
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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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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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1128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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3198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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3529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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1181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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2704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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1853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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[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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