问答

1答疑

[Problem Solving]

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题目：

In a certain region, the number of children who have been vaccinated against rubella is twice the number who have been vaccinated against mumps.  The number who have been vaccinated against both is twice the number who have been vaccinated only against mumps.  If 5,000 have been vaccinated against both, how many have been vaccinated only against rubella?

选项:

A、2,500
B、7,500
C、10,000
D、15,000
E、17,500

答案:

C
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[Sentence Correction]

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题目：

Based on accounts of various ancient writers, scholars have painted a sketchy picture of the activities of an all-female cult that, perhaps as early as the sixth century B.C., worshipped a goddess known in Latin as Bona Dea, "the good goddess."

选项:

A、Based on accounts of various ancient writers,Basing it on various ancient writers' accounts,
B、Basing it on various ancient writers' accounts,
C、With accounts of various ancient writers used for a basis,
D、By the accounts of various ancient writers they used,
E、Using accounts of various ancient writers,

答案:

E
1答疑

[Reading Comprehension]

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文章：

    For many years, theoretical economists characterized humans as rational beings relentlessly bent on maximizing purely selfish reward. Results of an experimental economics study appear to contradict this view, however. In the "Ultimatum Game," two subjects, who cannot exchange information, are placed in separate rooms. One is randomly chosen to propose how a sum of money, known to both, should be shared between them; only one offer, which must be accepted or rejected without negotiation, is allowed.

    If, in fact, people are selfish and rational, then the proposer should offer the smallest possible share, while the responder should accept any offer, no matter how small: after all, even one dollar is better than nothing. In numerous trials, however, two-thirds of the offers made were between 40 and 50 percent; only 4 percent were less than 20 percent. Among responders, more than half who were offered less than 20 percent rejected the offer. Behavior in the game did not appreciably depend on the players' sex, age, or education. Nor did the amount of money involved play a significant role: for instance, in trials of the game that were conducted in Indonesia, the sum to be shared was as much as three times the subjects' average monthly income, and still responders refused offers that they deemed too small.

题目：

The primary purpose of the passage is to

选项:

A、provide evidence in support of the view that human beings are essentially rational and selfish
B、use a particular study to challenge the argument that the economic behavior of human beings may be motivated by factors other than selfishness
C、compare certain views about human nature held by theoretical economists with those held by experimental economists
D、describe a study that apparently challenges theoretical economists' understanding of human economic behavior
E、suggest that researchers may have failed to take into account the impact of certain noneconomic factors in designing a study of human economic behavior

答案:

D
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[Critical Reasoning]

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题目：

Companies O and P each have the same number of employees who work the same number of hours per week. According to records maintained by each company, the employees of Company 0 had fewer job-related accidents last year than did the employees of Company P. Therefore, employees of Company 0 are less likely to have job-related accidents than are employees of Company P.
Which of the following, if true, would most weaken the conclusion?

选项:

A、The employees of Company P lost more time at work due to job-related accidents than did the employees of Company 0. 
B、Company P considered more types of accidents to be job-related than did Company 0. 
C、The employees of Company P were sick more often than were the employees of Company 0. 
D、Several employees of Company 0 each had more than one job-related accident. 
E、The majority of job-related accidents at Company 0 involved a single machine.

答案:

B
1答疑

[Data Sufficiency]

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题目：

If k , m , and t  are positive integers and += , do t  and 12 have a common factor greater than 1 ?
(1)   k  is a multiple of 3.
(2)   m  is a multiple of 3.

选项:

答案:

A
1答疑

[Reading Comprehension]

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文章：

题目：

The passage suggests which of the following about the workers who took temporary jobs during the 1980s?

选项:

A、Their jobs frequently led to permanent positions within firms.
B、They constituted a less demographically diverse group than has been suggested.
C、They were occasionally involved in actions organized by labor unions.
D、Their pay declined during the decade in comparison with the pay of permanent employees.
E、They did not necessarily prefer temporary employment to permanent employment.

答案:

E
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[Data Sufficiency]

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题目：

What is the value of v3 – k3?
(1)     v k > 0
(2)     v – k = 6
汰

选项:

答案:

E
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[Problem Solving]

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题目：

选项:

A、
B、
C、
D、
E、

答案:

E
1答疑

[Problem Solving]

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题目：

If x ≠ 0, then (x + 1/x)2 - (x - 1/x)2 =

选项:

A、1/x
B、x
C、1
D、2
E、4

答案:

E
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[Critical Reasoning]

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题目：

It has been suggested that with the continued advance of technology, robots will be able to replace skilled craftsmen who currently assemble and test sophisticated manufactured goods, such as musical instruments. This suggestion is based on the belief that the assembly and testing of musical instruments consists of learning a series of techniques and processes, which can be programmed automatically without any understanding of how the various parts are supposed to work together to produce a high quality musical instrument. If this were the case, then robots could be programmed to follow the techniques and processes, and craftsmen would not be needed to assemble and test the instruments. But to do their jobs, skilled craftsmen must also understand the principles of sound production, together with the nuances of tone quality and the other criteria of a high quality musical instrument. Therefore, the idea that robots will replace people in the production of musical instruments is seriously flawed.
Which one of the following selections, if true, would most seriously weaken the author’s conclusion that robots will not replace skilled craftsmen in the production of musical instruments?

选项:

A、A. Not as many musical instruments are being produced today, so the industry cannot afford to pay skilled craftsmen.
B、B. Musical instruments are not produced individually any more, but are mass produced in factories.
C、C. Robots can be programmed to understand the principles of sound production, the nuances of tone quality and the other criteria of a high quality musical instrument.
D、D. Robots can accomplish mundane assembly tasks much more cost-effectively than skilled craftsmen can.
E、E. Skilled craftsmen are responsible for ensuring that musical instruments meet high quality standards.

答案:

C
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351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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1309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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1493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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574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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1334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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950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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636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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646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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152991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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160099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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