问答

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[Critical Reasoning]

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题目：

Since 1978 when the copyright law was changed, books that are less than fifty years old must not be photocopied without the publisher’s permission. Thus, any book that has been photocopied since 1978 without the publisher’s permission must be at least fifty years old.

The reasoning above exhibits a flaw similar to one in which of the following?

选项:

A、Any member of the solar system must be either a planet or a moon, so if an asteroid is neither a planet nor a moon, it must not be a member of the solar system.
B、Anyone who rides a city bus must buy a bus pass, and since Demetrios has a bus pass, he must be riding on a city bus.
C、A driver who turns right must signal, so any driver who did not signal must not have turned right.
D、Anyone who legally crosses a national boundary must have a passport; thus anyone who does not have a passport cannot legally cross a national boundary.
E、Any wage earner residing in the state must pay state taxes, so since Blodwen pays state taxes, she must be resident in the state.

答案:

C
2答疑

[Sentence Correction]

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题目：

Because of a similarity to dance, synchronized swimming—exhibition swimming in which the movements of one or more swimmers synchronize to a musical accompaniment—is sometimes called water ballet, especially in theatrical situations.i

选项:

A、of one or more swimmers synchronize to
B、of one swimmer or more is synchronized with
C、of one or more swimmers are synchronized with
D、by one swimmer or more is synchronized to
E、by one or more swimmers synchronize to

答案:

C
2答疑

[Critical Reasoning]

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题目：

Researchers have found that when very overweight people, who tend to have relatively low metabolic rates, lose weight primarily through dieting, their metabolisms generally remain unchanged.  They will thus burn significantly fewer calories at the new weight than do people whose weight is normally at that level.  Such newly thin persons will, therefore, ultimately regain weight until their body size again matches their metabolic rate.
The conclusion of the argument above depends on which of the following assumptions?

选项:

A、Relatively few very overweight people who have dieted down to a new weight tend to continue to consume substantially fewer calories than do people whose normal weight is at that level.
B、The metabolisms of people who are usually not overweight are much more able to vary than the metabolisms of people who have been very overweight.
C、The amount of calories that a person usually burns in a day is determined more by the amount that is consumed that day than by the current weight of the individual.
D、Researchers have not yet determined whether the metabolic rates of formerly very overweight individuals can be accelerated by means of chemical agents.
E、Because of the constancy of their metabolic rates, people who are at their usual weight normally have as much difficulty gaining weight as they do losing it.

答案:

A
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[Critical Reasoning]

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题目：

Early in the twentieth century, Lake Konfa became very polluted.  Recently fish populations have recovered as release of industrial pollutants has declined and the lake's waters have become cleaner.  Fears are now being voiced that the planned construction of an oil pipeline across the lake's bottom might revive pollution and cause the fish population to decline again.  However, a technology for preventing leaks is being installed.  Therefore, provided this technology is effective, those fears are groundless.
 
The argument depends on assuming which of the following?

选项:

A、Apart from development related to the pipeline, there will be no new industrial development around the lake that will create renewed pollution in its waters.
B、Other than the possibility of a leak, there is no realistic pollution threat posed to the lake by the pipeline's construction.
C、There is no reason to believe that the leak-preventing technology would be ineffective when installed in the pipeline in Lake Konfa.
D、Damage to the lake's fish populations would be the only harm that a leak of oil from the pipeline would cause.
E、The species of fish that are present in Lake Konfa now are the same as those that were in the lake before it was affected by pollution.

答案:

B
2答疑

[Critical Reasoning]

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题目：

A survey of entrepreneurs who started companies last year shows that while virtually all did substantial preparatory research and planning, only half used that work to produce a formal business plan.  Since, on average, the entrepreneurs without formal plans secured the capital they needed in half the time of those with plans, these survey results indicate that, in general, formal plans did not help the entrepreneurs who produced them to secure the capital they needed.
 
Which of the following, if true, most seriously weakens the argument?

选项:

A、Companies started by entrepreneurs who had used formal business plans to attract investment were on the whole as profitable in their first year as were companies started by entrepreneurs who had not produced such plans.
B、In surveys of entrepreneurs who have attempted without success to raise sufficient capital, more than half of the respondents indicate that they have produced a formal business plan.
C、Among the entrepreneurs surveyed, those who did not produce formal business plans sought and received a much larger proportion of their capital from investors with whom they had a long-standing business relationship.
D、The entrepreneurs surveyed who did not produce a formal business plan spent nearly as much time doing preparatory research and planning as the entrepreneurs who produced plans.
E、The entrepreneurs who produced business plans generally reported later that the process of writing the plan had increased their confidence that their company would succeed.

答案:

C
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[Sentence Correction]

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题目：

As well as heat and light, the Sun is the source of a continuous stream of atomic particles known as the solar wind.

选项:

A、As well as heat and light, the Sun is the source of a continuous stream
B、Besides heat and light, also the Sun is the source of a continuous stream
C、Besides heat and light, the Sun is also the source of a continuous streaming
D、The Sun is the source not only of heat and light, but also of a continuous stream
E、The Sun is the source of not only heat and light but, as well, of a continuous streaming

答案:

D
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[Problem Solving]

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题目：

In the figure shown, two identical squares are inscribed in the rectangle. If the perimeter of the rectangle is , then what is the perimeter of each square?

选项:

A、
B、12
C、
D、16
E、18

答案:

B
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[Reading Comprehension]

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文章：

    Anthropologists once thought that the ancestors of modern humans began to walk upright because it freed their hands to use stone tools ,which they had begum to make as the species evolved a brain of increased size and mental capacity. But discoveries of the three-million-year-old fossilized remains of our hominid ancestor Australopithecus have yielded substantial anatomical evidence that upright walking Appeared prior to the dramatic enlargement of the brain and the development of stone tools. Walking on two legs in an upright posture (bipedal locomotion) is a less efficient proposition than walking on all fours (quadrupedal locomotion) because several muscle groups that the quadruped uses for propulsion must instead to provide the biped the biped with stability and control. The shape and configuration of various bones must likewise be modified to allow the muscles to perform these functions in upright walking. Reconstruction of the pelvis (hipbones) and femur (thighbone) of "Lucy", a three-million-year-old skeleton that is the most complete fossilized skeleton from the australopithecine era, has shown that they are much more like he corresponding bones of the modern human than like those of the most closely related living primate, the quadrupedal chimpanzee. Lucy's wide, shallow pelvis is actually better suited to bipedal walking than is the rounder, bowl-like pelvis of the modern human, which evolved to form the larger birth canal needed to accommodate the head of a largebrained human infant .By contrast, the bead of Lucy's baby could have been no larger than that of a baby chimpanzee.

    If the small-brained australopithecines were not toolmakers, what evolutionary advantage did they gain by walking upright? One theory is that bipedality evolved in conjunction with the nuclear family: monogamous parents cooperating to care for their offspring. Walking upright permitted the father to use his hands to gather food and carry it to his mate from a distance, allowing the mother to devote more time and energy to nurturing and protecting their children. According to this view, the transition to bipedal walking may have occurred as long as ten million years ago, at the time of the earliest hominids, making it a crucial initiating event in human evolution.

题目：

the passage suggests that ,in comparison with the hominid australopithecines, modern humans are

选项:

A、less well adapted to large group  cooperation
B、less well adapted to walking upright
C、ore agile in running and climbing
D、more well suited to a nuclear family structure
E、more well suited to cooperative caring for their offspring

答案:

B
2答疑

[Reading Comprehension]

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文章：

    The system of patentgranting, which confers temporary monopolies for the exploitation of new technologies, was originally established as an incentive to the pursuit of risky new ideas. Yet studies of the most patent-conscious business of all—the semiconductor industry-suggest that firms do not necessarily become more innovative as they increase their patenting activity. Ziedonis and Hall, for example, found that investment in research and development (a reasonable proxy for innovation) did not substantially increase between 1982 and 1992, the industry's most feverish period of patenting. Instead, semiconductor firms simply squeezed more patents out of existing research and development expenditures. Moreover, Ziedonis and Hall found that as patenting activity at semiconductor firms increased in the 1980's, the consensus among industry employees was that the average quality of their firms' patents declined. Though patent quality is a difficult notion to measure, the number of times a patent is cited in the technical literature is a reasonable yardstick, and citations per semiconductor patent did decline during the 1980's. This decline in quality may be related to changes in the way semiconductor firms managed their patenting process: rather than patenting to win exclusive rights to a valuable new technology, patents were filed more for strategic purposes, to be used as bargaining chips to ward off infringement suites or as a means to block competitors' products.

题目：

The passage suggests which of the following about patenting in the semiconductor industry during the period from 1982 to 1992 ?

选项:

A、The declining number of citations per semiconductor patent in the technical literature undermines the notion that patenting activity increased during this period.
B、A decline in patent quality forced firms to change the way they managed the patenting process.
C、Increased efficiencies allowed firms to derive more patents from existing research and development expenditures.
D、Firms' emphasis on filing patents for strategic purposes may have contributed to a decline in patent quality.
E、Firms' attempts to derive more patents from existing research and development expenditures may have contributed to a decline in infringement suites.

答案:

D
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[Critical Reasoning]

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题目：

Some communities in Florida are populated almost exclusively by retired people and contain few, if any, families with small children. Yet these communities are home to thriving businesses specializing in the rental of furniture for infants and small children.
Which of the following, if true, best reconciles the seeming discrepancy described above?

选项:

A、The businesses specializing in the rental of children's furniture buy their furniture from distributors outside of Florida.
B、The few children who do reside in these communities all know each other and often make overnight visits to one another's houses. 
C、Many residents of these communities who move frequently prefer renting their furniture to buying it outright. 
D、Many residents of these communities must provide for the needs of visiting grandchildren several weeks a year. 
E、Children's furniture available for rental is of the same quality as that available for sale in the stores.

答案:

D
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1289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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3649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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4019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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1336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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2995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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2076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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1403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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338328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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