问答

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[Problem Solving]

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题目：

Company S produces two kinds of stereos:  basic and deluxe.  Of the stereos produced by Company S last month,  2/3 were basic and the rest were deluxe.  If it takes 7/5 as many hours to produce a deluxe stereo as it does to produce a basic stereo, then the number of hours it took to produce the deluxe stereos last month was what fraction of the total number of hours it took to produce all the stereos?N

选项:

A、
B、
C、
D、
E、

答案:

A
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[Reading Comprehension]

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文章：

    Astronomers theorize that a black hole forms when a massive object shrinks catastrophically under its own gravity, leaving only a gravitational field so strong that nothing escapes it. Astronomers must infer the existence of black holes, which are invisible, from their gravitational influence on the visible bodies surrounding them. For example, observations indicate that gas clouds in galaxy M87 are whirling unusually fast about the galaxy's center. Most astronomers believe that the large concentration of mass at the galaxy's center is a black hole whose gravity is causing the gas to whirl. A few skeptics have argued that the concentration of mass necessary to explain the speed of the whirling gas is not necessarily a black hole: the concentration in M87 might be a cluster of a billion or so dim stars.

    The same hypothesis might have been applied to the galaxy NGC 4258, but the notion of such a cluster's existing in NGC 4258 was severely undermined when astronomers measured the speed of a ring of dust and gas rotating close to the galaxy's center. From its speed, they calculated that the core's density is more than 40 times the density estimated for any other galaxy. If the center of NGC 4258 were a star cluster, the stars would be so closely spaced that collisions between individual stars would have long ago torn the cluster apart.

题目：

The skeptics mentioned in the first paragraph would be most likely to agree with the astronomers mentioned in the highlighted text about which of the following statements concerning the galaxy M87?

选项:

A、The speed of the gas whirling around the center of M87 is caused by a dense object that is not a black hole.
B、The concentration of mass at the center of M87 is probably a large cluster of dim stars.
C、The presence of a black hole at the center of M87 is the most likely explanation for the speed of the gas whirling about the galaxy's core.
D、The speed of the gas whirling around the center of M87 is caused by a large concentration of mass at the core of M87.
E、The gravitational influence of a star cluster would not be strong enough to account for the speed of the gas whirling around the core of M87.

答案:

D
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[Sentence Correction]

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题目：

According to a study published in The New England Journal of Medicine, aspirin prevents blood clots just as well as a commonly used and more expensive blood-thinning drug does.

选项:

A、 prevents blood clots just as well as a commonly used and more expensive blood-thinning drug does
B、 prevents blood clots just as well as does a commonly used and a more expensive blood-thinning drug
C、 prevents blood clots just as well as will a commonly used and more expensive blood-thinning drug
D、 works just as well as a commonly used and more expensive blood-thinning drug at the prevention of blood clots
E、 works just as well as does a commonly used blood-thinning drug, which is also more expensive, at preventing blood clots

答案:

A
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[Problem Solving]

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题目：

If the sequence x1, x2, x3, …, xn, … is such that x1 = 3 and xn+1 = 2xn – 1 for n ≥ 1, then x20 – x19 =
䈼举呏⼼

选项:

A、219
B、220
C、221
D、220 - 1
E、221 - 1

答案:

A
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[Critical Reasoning]

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题目：

Roland:  The alarming fact is that 90 percent of the people in this country now report that they know someone who is unemployed.
 
Sharon:  But a normal, moderate level of unemployment is 5 percent, with 1 out of 20 workers unemployed.  So at any given time if a person knows approximately 50 workers, 1 or more will very likely be unemployed.
 
Sharon's argument relies on the assumption that

选项:

A、normal levels of unemployment are rarely exceeded
B、unemployment is not normally concentrated in geographically isolated segments of the population
C、the number of people who each know someone who is unemployed is always higher than 90% of the population
D、Roland is not consciously distorting the statistics he presents
E、knowledge that a personal acquaintance is unemployed generates more fear of losing one's job than does knowledge of unemployment statistics

答案:

B
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[Reading Comprehension]

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文章：

According to P. F. Drucker, the management philosophy known as Total Quality Management (TQM), which is designed to be adopted consistently throughout an organization and to improve customer service by using sampling theory to reduce the variability of a product's quality, can work successfully in conjunction with two older management systems.  As Drucker notes, TQM's scientific approach is consistent with the statistical sampling techniques of the "rationalist" school of scientific management, and the organizational structure associated with TQM is consistent with the social and psychological emphases of the "human relations" school of management.
 
However, TQM cannot simply be grafted onto these systems or onto certain other non-TQM management systems.  Although, as Drucker contends, TQM shares with such systems the ultimate objective of increasing profitability, TQM requires fundamentally different strategies.  While the other management systems referred to use upper management decision-making and employee specialization to maximize shareholder profits over the short term, TQM envisions the interests of employees, shareholders, and customers as convergent.  For example, lower prices not only benefit consumers but also enhance an organization's competitive edge and ensure its continuance, thus benefiting employees and owners.  TQM's emphasis on shared interests is reflected in the decentralized decision-making, integrated production activity, and lateral structure of organizations that achieve the benefits of TQM.

题目：

Which of the following best describes the relationship of the second paragraph to the first paragraph?

选项:

A、It presents contrasting explanations for a phenomenon presented in the first paragraph.
B、It discusses an exception to a general principle outlined in the first paragraph.
C、It provides information that qualifies a claim presented in the first paragraph.
D、It presents an example that strengthens a claim presented in the first paragraph.
E、It presents an alternative approach to solving a problem discussed in the first paragraph.

答案:

C
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题目：

Laos has a land area about the same as Great Britain but only four million in population, where many are members of hill tribes ensconced in the virtually inaccessible mountain valleys of the north.

选项:

A、about the same as Great Britain but only four million in population, where many
B、of about the same size as Great Britain is, but in Laos there is a population of only four million, and many
C、of about the same size as Great Britain is, but in Laos there is a population of only four million, and many
D、comparable to the size of Great Britain, but only four million in population, and many
E、comparable to that of Great Britain but a population of only four million people, many of whom

答案:

E
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题目：

Evolutionary psychology holds that the human mind is not a "blank slate," but instead that it comprises specialized mental mechanisms that were developed as a way of solving specific problems human ancestors faced millions of years ago.

选项:

A、 the human mind is not a 'blank slate,' but instead that it comprises specialized mental mechanisms that were developed as a way of solving
B、 the human mind is not a 'blank slate' but instead comprises specialized mental mechanisms that were developed to solve
C、 the human mind, instead of a 'blank slate,' it comprises specialized mental mechanisms that have been developed to solve
D、 rather than it being a 'blank slate,' the human mind comprises specialized mental mechanisms that have been developed as a way of solving
E、 rather than the human mind's being a 'blank slate,' that it comprises specialized mental mechanisms that were developed as a way of solving

答案:

B
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[Reading Comprehension]

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文章：

    Why firms adhere to or deviate from their strategic plans is poorly understood. However, theory and limited research suggest that the process through which such plans emerge may play a part. In particular, top management decision-sharing consensus-oriented, team-based Decision -making-may increase the likelihood that firms will adhere to their plans, because those involved in the decision-making may be more committed to the chosen course of action, thereby increasing the likelihood that organizations will subsequently adhere to their plans.

    However, the relationship between top management decision-sharing and adherence to plans may be affected by a firm's strategic mission (its fundamental approach to increasing sales revenue and market share, and generating cash flow and short-term profits). At one end of the strategic mission continuum, "build" strategies are pursued when a firm desires to increase its market share and is willing to sacrifice short-term profits to do so. At the other end, "harvest" strategies are used when a firm is willing to sacrifice market share for short-term profitability and cash-flow maximization. Research and theory suggest that top management decision-sharing may have a more positive relationship with adherence to plans among firms with harvest strategies than among firms with build strategies. In a study of strategic practices in several largefirms, managers in harvest strategy scenarios were more able to adhere to their business plans. As one of the managers in the study explained it, this is partly because "[t] ypically all a manager has to do [when implementing a harvest strategy] is that which was done last year." Additionally, managers under harvest strategies may have fewer strategic options than do those under build strategies; it may therefore be easier to reach agreement on a particular course of action through decision-sharing, which will in turn tend to promote adherence to plans. Conversely, in a "build" strategy scenario, individual leader-ship, rather than decision-sharing, may promote adherence to plans. Build strategies-which typically require leaders with strong personal visions for a firm's future, rather than the negotiated compromise of the team-based decision-maybe most closely adhered to when implemented in the context of a clear strategic vision of an individual leader, rather than through the practice of decision-sharing.

题目：

The primary purpose of the passage is to

选项:

A、identify some of the obstacles that make it difficult for firms to adhere to their strategic business plans
B、compare two different theories concerning why firms adhere to or deviate from their strategic plans
C、evaluate the utility of top management decision-sharing as a method of implementing the strategic mission of a business
D、discuss the respective advantages and disadvantages of build and harvest strategies among several large firms
E、examine some of the factors that may affect whether or not firms adhere to their strategic plans

答案:

E
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[Problem Solving]

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题目：

If s is the product of the integers from 100 to 200, inclusive, and t is the product of the integers from 100 to 201, inclusive, what is 1/s + 1/t in terms of t?

选项:

A、 (201)2/t
B、 [(202)(201)]/t
C、 201/t
D、 202/t
E、  [(202)(201)]/t2

答案:

D
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554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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[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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1134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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