问答

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题目：

If Whitney wrote the decimal representations for the first 300 positive integer multiples of 5 and did not write any other numbers, how many times would she have written the digit 5 ?

选项:

A、150
B、185
C、186
D、200
E、201

答案:

E
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[Sentence Correction]

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题目：

The Commerce Department reported that the nation's economy grew at a brisk annual pace of 3.7 percent in the second quarter, but that while businesses were expanding their production, unsold goods piled up on store shelves as consumer spending is slowed sharply.

选项:

A、unsold goods piled up on store shelves as consumer spending is slowed sharply
B、unsold goods were piling up on store shelves as consumer spending slowed sharply
C、unsold goods had piled up on store shelves with a sharp slowing of consumer spending
D、consumer spending was slowing sharply, with the piling up of unsold goods on store shelves
E、consumer spending has slowed sharply, with unsold goods piling up on store shelves

答案:

B
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[Data Sufficiency]

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题目：

In the xy-plane, the line k passes through the origin and through the point (a, b), where ab ≠ 0. Is b positive?
(1) The slope of line k is negative.
(2) a ＜ b
湡

选项:

答案:

C
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[Data Sufficiency]

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题目：

From Leland's gross pay of p  dollars last week, t  percent was deducted for taxes and then s dollars was deducted for savings.  What amount of Leland's gross pay last week remained after these two deductions?
(1)     = 244
(2)     pt = 7,552

选项:

答案:

C
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[Critical Reasoning]

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文章：

Community activist: If Morganville wants to keep its central shopping district healthy, it should prevent the opening of a huge SaveAll discount department store on the outskirts of Morganville. Records from other small towns show that whenever SaveAll has opened a store outside the central shopping district of a small town, within fi ve years the town has experienced the bankruptcies of more than a quarter of the stores in the shopping district.

题目：

The answer to which of the following would be most useful for evaluating the community activist’s reasoning?

选项:

A、Have community activists in other towns successfully campaigned against the opening of a SaveAll store on the outskirts of their towns? Do a large percentage of the residents of Morganville currently do almost all of their shopping at stores in Morganville? 
B、In towns with healthy central shopping districts, what proportion of the stores in those districts suffer bankruptcy during a typical fi ve-year period? 
C、What proportion of the employees at the SaveAll store on the outskirts of Morganville will be drawn from Morganville?
D、Do newly opened SaveAll stores ever lose money during their fi rst fi ve years of operation?

答案:

C
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题目：

 x  C(x)

0

10

20

30

40

50

 25,000 

24,919

24,846

24,781

24,724

24,675

A certain manufacturer uses the function C (x) = 0.04x 2 – 8.5x + 25,000 to calculate the cost, in dollars, of producing x thousand units of its product. The table above gives values of this cost function for values of x between 0 and 50 in increments of 10. For which of the following intervals is the average rate of decrease in cost less than the average rate of decrease in cost for each of the other intervals?

选项:

A、From x = 0 to x = 10
B、From x = 10 to x = 20
C、From x = 20 to x = 30
D、From x = 30 to x = 40
E、From x = 40 to x = 50

答案:

E
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[Data Sufficiency]

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题目：

If x and y are integers, what is the value of 2x6y - 4 ?
(1) x2y = 16
(2)   xy = 4

选项:

答案:

A
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题目：

Shipwrecks are more likely to be found undisturbed at great depths than in shallow coastal waters, which exposes archaeological remains to turbulence and makes them accessible to anyone in scuba gear, whether they be archaeologist, treasure hunter, or sport diver.

选项:

A、 than in shallow coastal waters, which exposes archaeological remains to turbulence and makes them accessible to anyone in scuba gear, whether they be
B、 than in shallow coastal waters, where archaeological remains are exposed to turbulence and are accessible to anyone in scuba gear, whether
C、 as opposed to shallow waters along the coast, where archaeological remains are exposed to turbulence and are accessible to anyone in scuba gear, including
D、 instead of in shallow waters along the coast, which exposes archaeological remains to turbulence and makes them accessible to anyone in scuba gear, including an
E、 instead of shallow coastal waters, because it exposes archaeological remains to turbulence and makes them accessible to anyone in scuba gear, whether

答案:

B
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[Critical Reasoning]

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题目：

Under the agricultural policies of Country R, farmers can sell any grain not sold on the open market to a grain board at guaranteed prices. It seems inevitable that, in order to curb the resultant escalating overproduction, the grain board will in just a few years have to impose quotas on grain production, limiting farmers to a certain flat percentage of the grain acreage they cultivated previously.

Suppose an individual farmer in Country R wishes to minimize the impact on profits of the grain quota whose eventual imposition is being predicted. If the farmer could do any of the following and wants to select the most effective course of action, which should the farmer do now?

选项:

A、Select in advance currently less profitable grain fields and retire them if the quota takes effect.
B、Seek long-term contracts to sell grain at a fixed price.
C、Replace obsolete tractors with more efficient new ones.
D、Put marginal land under cultivation and grow grain on it.
E、Agree with other farmers on voluntary cutbacks in grain production.

答案:

D
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题目：

There are 11 women and 9 men in a certain club.  If the club is to select a committee of 2 women and 2 men, how many different such committees are possible?

选项:

A、120
B、720
C、1,060
D、1,520
E、1,980

答案:

E
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322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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1254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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1435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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555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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1301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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928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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623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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628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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[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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