问答

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[Critical Reasoning]

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题目：

Rabbits were introduced to Numa Island in the nineteenth century.  Overgrazing by the enormous population of rabbits now menaces the island's agriculture.  The government proposes to reduce the population by using a virus that has caused devastating epidemics in rabbit populations elsewhere.  There is, however, a chance that the virus will infect the bilby, an endangered native marsupial.  The government's plan, therefore, may serve the interests of agriculture but will clearly increase the threat to native wildlife.
 
Which of the following, if true, most seriously weakens the argument?

选项:

A、There is less chance that the virus will infect domestic animals on Numa than that it will infect bilbies.
B、There are no species of animals on the island that prey on the rabbits.
C、Overgrazing by rabbits endangers many of the plants on which bilbies feed.
D、The virus that the government proposes to use has been successfully used elsewhere to control populations of rabbits.
E、There is no alternative means of reducing the rabbit population that would involve no threat to the bilby.

答案:

C
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[Sentence Correction]

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题目：

Although some had accused Smith, the firm's network manager, of negligence when the crucial data went missing, the CEO defused a situation that was quite tense with her public statement that the debacle was not Smith's fault.

选项:

A、a situation that was quite tense with her public statement that the debacle was not Smith's fault
B、a situation that was quite tense, by publicly stating that the debacle was not Smith's fault
C、a situation, which was quite tense, by stating publicly that Smith was not responsible for the debacle
D、a quite tense situation with a public statement about the debacle not being Smith's fault
E、a quite tense situation by publicly stating the debacle not to have been Smith's fault

答案:

B
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[Data Sufficiency]

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题目：

What is the remainder when the positive integer x is divided by 8?
(1)     When x is divided by 12, the remainder is 5.
(2)     When x is divided by 18, the remainder is 11.

选项:

答案:

E
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[Sentence Correction]

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题目：

Floating in the waters of the equatorial Pacific, an array of buoys collects and transmits data on long-term interactions between the ocean and the atmosphere, interactions that affect global climate.

选项:

A、atmosphere, interactions that affect
B、atmosphere, with interactions affecting
C、atmosphere that affects
D、atmosphere that is affecting
E、atmosphere as affects

答案:

A
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[Sentence Correction]

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题目：

Part of the proposed increase in state education spending is due to higher enrollment, since the number of students in public schools have grown steadily since the mid-1980's and, at nearly 47 million, are at a record high.
 

选项:

A、 enrollment, since the number of students in public schools have grown steadily since the mid-1980's and, at nearly 47 million, are at
B、 enrollment, with a number of students in public schools growing steadily since the mid-1980's and, at nearly 47 million, reaching
C、 enrollment: since students in public schools have grown steadily in number since the mid-1980's and, at nearly 47 million, have reached
D、 enrollment: the number of students in public schools has grown steadily since the mid-1980's and, at nearly 47 million, has reached
E、 enrollment: students in public schools have grown steadily in number since the mid-1980's and, at nearly 47 million, are at

答案:

D
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[Sentence Correction]

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题目：

Citing the recent increase in earnings by several computer companies, economists feel that a cycle has begun in which personal computer users, especially corporate consumers, are replacing their PC's with more powerful models.

选项:

A、a cycle has begun in which personal computer users
B、a cycle for personal computer users has begun in which they
C、there is a cycle beginning for personal computer users
D、it is the beginning of a cycle for personal computer users
E、personal computer users are in the beginning of a cycle when they

答案:

A
4答疑

[Critical Reasoning]

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题目：

Although most smoking-related illnesses are caused by inhaling the tar in tobacco smoke, it is addiction to nicotine that prevents most smokers from quitting.  In an effort to decrease the incidence of smoking-related illnesses, lawmakers in Sandonia plan to reduce the average quantity of nicotine per cigarette by half over the next five years.  Unfortunately, smokers who are already addicted to nicotine tend to react to such reductions by smoking correspondingly more cigarettes.

The information above most strongly supports which of the following predictions about the effects of implementing the Sandonian government’s plan?

选项:

A、The average quantity of tar inhaled by Sandonian smokers who are currently addicted to nicotine will probably not decrease during the next five years.
B、Sandonian smokers who are not already addicted to nicotine will probably also begin to smoke more cigarettes during the next five years than they had previously.
C、The annual number of Sandonian smokers developing smoking-related illnesses will probably decrease during the next five years.
D、The proportion of Sandonians attempting to quit smoking who succeed in that attempt will probably decrease during the next five years.
E、The number of Sandonians who quit smoking during the next five years will probably exceed the number who quit during the last five years.

答案:

A
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[Reading Comprehension]

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文章：

    In 1994, a team of scientists led by David Mckay began studying the meteorite ALH84001, which had been discovered in Antarctica in 1984. Two years later, the McKay team announced that ALH84001, which scientists generally agree originated on Mars, contained compelling evidence that life once existed on Mars. This evidence includes the discovery of organic molecules in ALH84001,the first ever found in Martian rock. Organic molecules-complex, carbon based compounds-form the basis for terrestrial life. The organic molecules found in ALH84001 are polycyclic aromatic hydrocarbons, or PAH's. When microbes die, their organic material often decays into PAH's.

    Skepticism about the McKay team's claim remains, however. For example,ALH84001 has been on earth for 13,000 years, suggesting to some scientists that its PAH's might have resulted from terrestrial contamination. However, McKay's team has demonstrated that the concentration of PAH's increases as one looks deeper into ALH84001, contrary to what one would expect from terrestrial contamination. The skeptic's strongest argument, however, is that processes unrelated to organic life can easily produce all the evidence found by McKay' steam, including PAH's. For example, star formation produces PAH's. Moreover, PAH's frequently appear in other meteorites, and no one attributes their presence to life processes. Yet McKay's team notes that the particular combination of PAH's in ALH84001 is more similar to the combinations produced by decaying organisms than to those originating form nonbiological processes.

题目：

The primary purpose of the passage is to

选项:

A、describe new ways of studying the possibility that life once existed on Mars
B、revise a theory regarding the existence of life on Mars in light of new evidence
C、reconcile conflicting viewpoints regarding the possibility that life once existed on Mars
D、evaluate a recently proposed argument concerning the origin of ALH84001
E、describe a controversy concerning the significance of evidence from ALH84001

答案:

E
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[Sentence Correction]

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题目：

There are no legal limits, as there are for cod and haddock, on the size of monkfish that can be caught, a circumstance that contributes to their depletion through overfishing.

选项:

A、There are no legal limits, as there are for cod and haddock, on the size of monkfish that can be caught, a circumstance that contributes to their depletion through overfishing.
B、There are no legal limits on the size of monkfish that can be caught, unlike cod or haddock, a circumstance that contributes to depleting them because they are being overfished.
C、There are legal limits on the size of cod and haddock that can be caught, but not for monkfish, which contributes to its depletion through overfishing.
D、Unlike cod and haddock, there are no legal size limits on catching monkfish, which contributes to its depletion by being overfished.
E、Unlike catching cod and haddock, there are no legal size limits on catching monkfish, contributing to their depletion because they are overfished.

答案:

A
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[Reading Comprehension]

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文章：

Line        Resin is a plant secretion that hardens when
 exposed to air; fossilized resin is called amber.
 Although Pliny in the first century recognized that
 amber was produced from “marrow discharged by
(5)trees,” amber has been widely misunderstood to be
 a semiprecious gem and has even been described
 in mineralogy textbooks. Confusion also persists
 surrounding the term “resin,” which was defined
 before rigorous chemical analyses were available.
(10)Resin is often confused with gum, a substance
 produced in plants in response to bacterial infections,
 and with sap, an aqueous solution transported
 through certain plant tissues. Resin differs from both
 gum and sap in that scientists have not determined a
(15)physiological function for resin.
      In the 1950s, entomologists posited that resin
 may function to repel or attract insects. Fraenkel
 conjectured that plants initially produced resin in
 nonspecific chemical responses to insect attack
(20)and that, over time, plants evolved that produced
 resin with specific repellent effects. But some insect
 species, he noted, might overcome the repellent
 effects, actually becoming attracted to the resin.
 This might induce the insects to feed on those
(25)plants or aid them in securing a breeding site.
 Later researchers suggested that resin mediates
 the complex interdependence, or “coevolution,” of
 plants and insects over time. Such ideas led to the
 development of the specialized discipline of chemical
(30)ecology, which is concerned with the role of plant
 chemicals in interactions with other organisms and
 with the evolution and ecology of plant antiherbivore
 chemistry (plants' chemical defenses against attack
 by herbivores such as insects).


题目：

The author of the passage refers to Pliny most probably in order to

选项:

A、now at a lower rate than
B、now lower than
C、now a lower rate than
D、presently lower than it was
E、presently lower than the rate was

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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1685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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[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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709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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[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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772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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[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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