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GMAT逻辑解释题例题二

2018-06-20 18:02:00 来源:网络GMAT资料下载

  备考GMAT逻辑部分,大家可以从题型入手,针对不同的题型,做不同的模拟练习。这样能够辅助大家更好地来完成不同题型的备考。新东方在线托福网为大家整理了相关的内容,供大家参考复习。

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  3. In Asia, where palm trees are non-native, the trees’ flowers have traditionally been pollinated by hand, which has kept palm fruit productivity unnaturally low. When weevils known to be efficient pollinators of palm flowers were introduced into Asia in 1980, palm fruit productivity increased-by up to fifty percent in some areas-but then decreased sharply in 1984.

  Which of the following statements, if true, would best explain the 1984 decrease in productivity?

  A. Prices for palm fruit fell between 1980 and 1984 following the rise in production and a concurrent fall in demand.

  B. Imported trees are often more productive than native trees because the imported ones have left behind their pests and diseases in their native lands.

  C. Rapid increases in productivity tend to deplete trees of nutrients needed for the development of the fruit-producing female flowers.

  D. The weevil population in Asia remained at approximately the same level between 1980 and 1984. C

  E. Prior to 1980 another species of insect pollinated the Asian palm trees, but not as efficiently as the species of weevil that was introduced in 1980.

  4. The tobacco industry is still profitable and projections are that it will remain so. In the United States this year, the total amount of tobacco sold by tobacco-farmers has increased, even though the number of adults who smoke has decreased.

  Each of the following, if true, could explain the simultaneous increase in tobacco sales and decrease in the number of adults who smoke EXCEPT:

  A. During this year, the number of women who have begun to smoke is greater than the number of men who have quit smoking

  B. The number of teen-age children who have begun to smoke this year is greater than the number of adults who have quit smoking during the same period

  C. During this year, the number of nonsmokers who have begun to use chewing tobacco or snuff is greater than the number of people who have quit smoking

  D. The people who have continued to smoke consume more tobacco per person than they did in the past

  E. More of the cigarettes made in the United States this year were exported to other countries than was the case last year.

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