问答

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[Critical Reasoning]

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题目：

The higher the level of certain vitamins and minerals in the bloodstream, the better a person's lung function, as measured by the amount of air the person can expel in one second.  The lung function of smokers is significantly worse, on average, than that of nonsmokers.  Clearly, therefore, one way for smokers to improve their lung function is for them to increase their intake of foods that are rich in these helpful vitamins and minerals.
 
Which of the following is an assumption on which this argument depends?

选项:

A、Smokers are less likely than nonsmokers to have diets that are rich in vitamins and minerals.
B、The lung function of smokers whose diets are rich in those vitamins and minerals is generally better than that of nonsmokers with comparable diets.
C、People whose diets are deficient in those vitamins and minerals do not typically have other health problems in addition to diminished lung function.
D、Stopping smoking will not typically improve lung function more than any diet changes can.
E、Smoking does not introduce into the body chemicals that prevent the helpful vitamins and minerals from entering the bloodstream.

答案:

E
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[Sentence Correction]

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题目：

Even though sub-Saharan Africa often evokes images of drought and famine, researchers say that the area is the home of more than 2,000 grains, vegetables, roots, fruits, and other foods that have the possibility for feeding the continent, even other parts of the world.

选项:

A、 have the possibility for feeding the continent, even
B、 have the possibility of feeding the continent, even of
C、 could feed the continent, so even with
D、 could feed the continent and even
E、 could possibly feed the continent and, in addition, for even

答案:

D
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[Sentence Correction]

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题目：

Severely hindered by problems with local suppliers, the fact that the AQ division also had a new management team to adapt to was not seen by the board of directors as a legitimate excuse for such low productivity.

选项:

A、Severely hindered by problems with local suppliers, the fact that the AQ division also had a new management team to adapt to
B、Though severely hindered by local supply problems, the fact that the AQ division also had a new management team to which to adapt
C、Severely hindered by problems with local suppliers, the AQ division also had to adapt to a new management team, but this
D、Severely hindered by local supply problems, that the AQ division also had to adapt to a new management team
E、Though severely hindered by problems with local suppliers, the AQ division's also having a new management team to which it had to adapt

答案:

C
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[Sentence Correction]

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题目：

In an attempt to attract more tourists, the Swiss government commissioned several life-size fiberglass cow statues, having them decorated by local artists, and set them up on the streets of Zurich.

选项:

A、the Swiss government commissioned several life-size fiberglass cow statues, having them decorated by local artists, and
B、the Swiss government commissioned several life-size fiberglass cow statues, they were decorated by local artists, and then
C、the Swiss government commissioned several life-size fiberglass cow statues, had them decorated by local artists, and
D、several life-size fiberglass cow statues were commissioned by the Swiss government, decorated by local artists, and then
E、several life-size fiberglass cow statues, commissioned by the Swiss government, were decorated by local artists, and they

答案:

C
4答疑

[Reading Comprehension]

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文章：

    Anole lizard species that occur together (sympatrically) on certain Caribbean islands occupy different habitats: some live only in the grass, some only on tree trunks, and some only on twigs. These species also differ morphologically: grass dwellers are slender with long tails, tree dwellers are stocky with long legs, twig dwellers are slender but stubby-legged. What is striking about these lizards is not that coexisting species differ in morphology and habitat use (such differences are common among closely related sympatric species), but that the same three types of habitat specialists occur on each of four islands: Puerto Rico, Cuba, Hispaniola, and Jamaica.Moreover, the Puerto Ricantwig species closely resembles the twig species of Cuba, Hispaniola, and Jamaica in morphology, habitat use, and behavior. Likewise, the specialists for other habitats are similar across the islands.

    The presence of similar species on different islands could be variously explained. An ancestral species might have adapted to exploit a particular ecological niche on one island and then traveled over water to colonize other islands. Or this ancestral species might have evolved at a time when the islands were connected, which some of these islands may once have been. After the islands separated, the isolated lizard populations would have become distinct species while also retaining their ancestors' niche adaptations. Both of these scenarios imply that specialization to each niche occurred only once. Alternatively, each specialist could have arisen independently on each of the is lands.

    If each type of specialist evolved just once, then similar specialists on different islands would be closely related. Conversely, if the specialists evolved independently on each island, then a specialist on one island would be more closely related to other types of anoles on the same island-regardless of their ecological niches-than it would be to a similar specialist on a different island.

    Biologists can infer how species are related evolutionarily by comparing DNA sequences for the same genes in different species. Species with similar DNA sequences for these genes are generally more closely related to each other than to species with less-similar DNA sequences. DNA evidence concerning the anoles led researchers to conclude that habitat specialists on one island are not closely related to the same habitat specialists elsewhere, indicating that specialists evolved independently on each island.

题目：

The primary purpose of the passage is to

选项:

A、describe some unusual features of anole lizard species
B、account for a particular type of behavior found among anole lizard species
C、contrast two types of evidence that have been used to support a particular hypothesis concerning anole lizard species
D、explain how researchers resolved a particular scientific question concerning anole lizard species
E、examine different explanations for a particular trait common to certain anole lizard species

答案:

D
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[Problem Solving]

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题目：

A certain characteristic in a large population has a distribution that is symmetric about the mean m. If 68 percent of the distribution lies within one standard deviation d of the mean, what percent of the distribution is less than m + d ?

选项:

A、16%
B、32%
C、48%
D、84%
E、92%

答案:

D
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[Critical Reasoning]

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题目：

Critics of certain pollution-control regulations have claimed that the money spent over the last decade in order to reduce emissions of carbon monoxide and of volatile organic compounds has been wasted.  The evidence they offer in support of this claim might appear compelling:  despite the money spent, annual emissions of these pollutants have been increasing steadily.  This evidence is far from adequate, however, since over the last decade a substantial number of new industrial facilities that emit these pollutants have been built.
 
In the reasoning given, the two portions in boldface play which of the following roles?

选项:

A、The first identifies a claim that the reasoning seeks to show is false; the second is evidence that has been cited by others in support of that claim.
B、The first identifies a claim that the reasoning seeks to show is false; the second is a position for which the reasoning seeks to provide support.
C、The first is a position that the reasoning contends is inadequately supported by the evidence; the second is a position for which the reasoning seeks to provide support.
D、The first is a position that the reasoning contends is inadequately supported by the evidence; the second is evidence used to support the reasoning's contention.
E、The first is a position that the reasoning contends is inadequately supported by the evidence; the second is evidence that has been used to support that position.

答案:

D
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[Sentence Correction]

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题目：

According to one expert, the cause of genetic irregularities in many breeds of dog is not so much that dogs are being bred for looks or to meet other narrow criteria as that the breeds have relatively few founding members.

选项:

A、the cause of genetic irregularities in many breeds of dog is not so much that dogs are being bred for looks or to meet other narrow criteria
B、the cause of genetic irregularities in many breeds of dog is not as much their being bred for looks or meeting other narrow criteria as much
C、it is not so much the cause of genetic irregularities in many breeds of dog that they are being bred for looks or meeting other narrow criteria as much
D、it is not so much that the cause of genetic irregularities in many breeds of dog is their being bred for looks or meeting other narrow criteria so much
E、it is not so much the cause of genetic irregularities in many breeds of dog to be bred for looks or to meet other narrow criteria

答案:

A
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[Sentence Correction]

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题目：

Building on civilizations that preceded them in coastal Peru, the Mochica developed their own elaborate society, based on cultivating such crops like corn and beans, the harvesting of fish and shellfish, and exploiting other wild and domestic resources.

选项:

A、based on cultivating such crops like corn and beans, the harvesting of fish and shellfish, and exploiting
B、based on the cultivation of such crops as corn and beans, the harvesting of fish and seafood, and the exploitation of
C、and basing it on the cultivation of crops like corn and beans, harvesting fish and seafood, and the exploiting of
D、and they based it on their cultivation of crops such as corn and beans, the harvest of fish and seafood, and exploiting
E、and they based it on their cultivating such crops like corn and beans, their harvest of fish and shellfish, and they exploited

答案:

B
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[Problem Solving]

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题目：

选项:

A、I only
B、I and II only
C、I and III only
D、II and III only
E、I, II, and III

答案:

B
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1284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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3627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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4004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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1333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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2989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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2070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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1330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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1398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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330278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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337404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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