问答

1答疑

[Problem Solving]

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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
1答疑

[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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[Sentence Correction]

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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
1答疑

[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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[Problem Solving]

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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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[Reading Comprehension]

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题目：

Which of the following arguments would a proponent of the labor theory of value, as it is presented in the first paragraph, be most likely to use in response to the statement that "The labor theory of value systematically disregards the productive contribution of capital goods"?

选项:

A、The productive contributions of workers and capital goods cannot be compared because the productive life span of capital goods is longer than that of workers.
B、The author's analysis of the distribution of income is misleading because only a small percentage of workers are also shareholders.
C、Capital goods are valuable only insofar as they contribute directly to the production of consumer goods.
D、The productive contribution of capital goods must be discounted because capital goods require maintenance.
E、The productive contribution of capital goods must be attributed to labor because capital goods are themselves products of labor.

答案:

E
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[Data Sufficiency]

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题目：

What is the average (arithmetic mean) height of the n people in a certain group?

选项:

A、Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B、Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C、BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D、EACH statement ALONE is sufficient.
E、Statements (1) and (2) TOGETHER are NOT sufficient.

答案:

A
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[Problem Solving]

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题目：

Ben and Ann are among 7 contestants from which 4 semifinalists are to be selected. Of the different possible selections, how many contain neither Ben nor Ann?

选项:

A、5
B、6
C、7
D、14
E、21

答案:

A
1答疑

[Reading Comprehension]

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文章：

    The experience of British business in Iran between the 1860's and the 1970's is one example of the changing importance of British enterprise in Asia as a whole. Before 1914 British business established and dominated Iran's modern industrial and financial sector; in the 1920's this domination began to wane; by the 1960's British enterprise was of little importance in the Iranian economy. While in Japan and India the decline of British business was primarily a function of the rise of strong indigenous business groups, in Iran, by contrast, the government played a large role in both challenging British commercial interests and stimulating locally owned enterprise. Periodic surges of intense Iranian economic nationalism must be understood partly as a reaction to the close relations between British business in Iran and the British government. In retrospect, it is possible to see the uneasy and ambiguous nature of this relationship. It is true that the British Imperial Bank in Iran was never entirely a tool of the British government, and that the Anglo-Iranian Oil Company did not take its orders from the British government, despite the 51 percent government shareholding. However, the relationship between British business and the British government was sufficiently close that many Iranians understandably viewed the oil company and the bank as symbols of a British imperialist policy.

题目：

The passage suggests which of the following about British business in Japan and India as compared to British business in Iran?

选项:

A、British business in Japan and India received less support from the British government than did British business in Iran.
B、During the early twentieth century, British business played less of a role in the Japanese and Indian economy than it did in the Iranian economy.
C、The governments of Japan and India played less of a role in the changing status of British business than did the government of Iran.
D、The types of enterprises conducted by the British in Japan and India were significantly different from the enterprises conducted by the British in Iran.
E、British business in Japan and India declined more gradually than did British business in Iran.

答案:

C
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[Multi-Source Reasoning]

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题目：

Assume that all students finishing up university have zero years of work experience.

For each of the following statements, select Conclusively Eligible if the candidate is absolutely eligible for the position he/she is applying for. Otherwise, select Not Conclusively Eligible.

选项:

A、Joe has 5 years of experience at a large bank doing insurance underwriting and modeling. He is currently at a top 3 business school (Harvard Business School), and wishes to apply for the position of Principal once recruiting begins in the fall.
B、Brian studied computer science with a GPA of 3.4 from a Top 15 University. After the internet bubble burst, he applied his analytical skills to learning excel and financial modeling in his free time. He is applying as an Analyst during his senior year in school.
C、Patricia has been working in healthcare consulting for 2.5 years. While consulting has been eye-opening and intellectually stimulating, she is growing tired of living out of a hotel and always being on the go. Some friends suggested she consider a job as an investment banking analyst - less travel but more hours into the weekends. Curious, she decides to pass her resume along to her friend for the position of Analyst.

答案:

A B A
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348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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1304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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1490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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573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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1330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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948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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635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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643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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152105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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159213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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