GWD - CR - 大全 附解释(6)

A. Per unit of volume, the natural insecticide produced by the genetically modified maize plants is less toxic to insects

than are many commercial insecticides commonly used on maize plants. B. Standard weed-control practices that have been used by farmers for decades have largely eliminated milkweed

plants from certain areas where monarch-butterfly caterpillars were once common. C. The experiments showed that the caterpillars were not harmed by contact with the pollen from the genetically

modified plants unless they ingested it. D. The maize-eating insects that the natural insecticide protects against do not feed on the pollen of the maize plant. E. Airborne maize pollen tends to collect on the middle leaves of milkweed plants and monarch caterpillars feed only

on the plant‘s tender upper leaves. ----------------------------------------------------------------------------------------------------------- Q21: GWD-13-31

By competing with rodents for seeds, black ants help control rodent populations that pose a public health risk. However, a very aggressive species of blank ant, the Loma ant, which has recently invaded a certain region, has a venomous sting that is often fatal to humans. Therefore, the planned introduction into that region of ant flies, which prey on Loma ants, would benefit public health.

Which of the following, if true, most strengthens the argument?

A. Ant flies do not attack black ants other than Loma ants.

B. Loma ants are less effective than many bird species in competing with rodents for seeds.

C. Certain other species of black ants are more effective than Loma ants in competing with rodents for seeds. D. The sting of Loma ants can also be fatal to rodents.

E. The use of pesticides to control Loma ants could have harmful effects on the environment. GWD-12-Q22:

Denoma, a major consumer-electronics maker, had a sizeable decline in sales revenue for its most recent fiscal year. This result appears surprising, because electronics retailers report that although their overall sales were considerably lower than in the previous year, their sales revenue from Denoma models actually grew, largely thanks to some innovative and popular models that Denoma introduced.

Which of the following, if true, does most to explain the apparently surprising result?

A. Because of the need to educate the public about its new models‘ capabilities, Denoma‘s advertising spending was

higher than normal over the period. B. For the period at issue, Denoma‘s major competitors reported declines in revenue that were, in percentage terms,

greater than Denoma‘s. C. A significant proportion of Denoma‘s revenue comes from making components for other consumer-electronics

manufacturers. D. Unlike some of its major competitors, Denoma has no lines of business outside consumer electronics to provide

revenue when retail sales of consumer electronics are weak. E. During the period, consumer-electronics retailers sold remaining units of Denoma‘s superseded models at prices that

were deeply discounted from those models‘ original prices. ------------------------------------------------------------------------------------------------------------ GWD-12-Q29:

The Earth‘s rivers constantly carry dissolved salts into its oceans. Clearly, therefore, by taking the resulting increase in salt levels in the oceans over the past hundred years and then determining how many centuries of such increases it would have

12

taken the oceans to reach current salt levels from a hypothetical initial salt-free state, the maximum age of the Earth‘s oceans can be accurately estimated.

Which of the following is an assumption on which the argument depends?

A. The quantities of dissolved salts deposited by rivers in the Earth‘s oceans have not been unusually large during the

past hundred years. B. At any given time, all the Earth‘s rivers have about the same salt levels. C. There are salts that leach into the Earth‘s oceans directly from the ocean floor.

D. There is no method superior to that based on salt levels for estimating the maximum age of the Earth‘s oceans. E. None of the salts carried into the Earth‘s oceans by rivers are used up by biological activity in the oceans.

VOTE FOR E

D。对D取非，有些年的盐异常高，则目前的盐度被高估，比如计算出是10M年，实际为8M年。海洋最大年龄为10M年没错。不能否定结论。

E。对E取非，有些盐被消耗，则目前的盐度被低估，比如计算值为10M，实际为12M，海洋最大年龄为10M是错的。否定结论。故为答案。

by taking the resulting increase in salt levels in the oceans over the past hundred years and then determining how many centuries of such increases it would have taken the oceans to reach current salt levels from a hypothetical initial salt-free state

管你盐是怎么来的，我只计算海水里的盐增加量就足够了（就是已经包括河水加盐减去生物耗盐的可能，所以E错）。但如果过去几百年河水盐unusually多了，海盐增加量当然比以前unusually高，把这个几百年里unusually高的增加量不恰当的推广到整个历史时期里，算出来的时间当然比真实时间的短。

----------------------------------------------------------------------------------------------------------- GWD-12-Q33:

Several of a certain bank’s top executives have recently been purchasing shares in their own bank. This

activity has occasioned some surprise, since it is widely believed that the bank, carrying a large number of bad loans, is on the brink of collapse. Since the executives are well placed to know their bank‘s true condition, it might seem that their share purchases show that the danger of collapse is exaggerated. However, the available information about the bank‘s condition is from reliable and informed sources, and corporate executives do sometimes buy shares in their own company in a calculated attempt to calm worries about their comp …… 此处隐藏：7459字，全部文档内容请下载后查看。喜欢就下载吧 ……