※ 引述《surfingdream (GMATing)》之铭言： : ※ 引述《kimoqueen (AT苦海何时能解脱~ @_@)》之铭言： : : The population of peregrine falcons declined rapidly during : : the 1950’s and 1960’s and reached an all-time low in the early 1970’s. : : The decline was attributed by scientists to the widespread use of the : : pesticide DDT in rural areas. : : Which of the following, if true, gives the strongest support : : to the scientists claim? : : (A) DDT was not generally in use in areas devoted to heavy industry. : : (B) In the time since the use of DDT was banned in 1972, : : the population of peregrine falcons has been steadily increasing. : : (C) Peregrine falcons, like other birds of prey, abandon eggs that : : fallen out of the nest, even if the eggs remain intact. : : (D) Starling, house sparrows, and blue jays-birds the peregrine : : falcon prey on—were not adversely affected by DDT in their habitats. : : (E) Other birds of prey, such as the osprey, the bald cage, and : : the brown pclican, are found in the same area as is the peregrine falcon. : : 答案是A 但我选B : 这题重点是要支持 科学家的claim：DDT是大量使用在 rural areas : (A)选项 把not去掉，即DDT是用在重工业的地方，反驳郊区，加上not刚好是支持 : 不过这个选项也有点缺陷，因为他也没提到 rural areas是否就没有重工业.... : (B)即使population稳定成长，还是不足以支持DDT是用在郊区 这题我也选B 这题主要是由果推因，若"peregrine falcons数量下降"视为B "广泛使用DDT"视为A 若B-->A 是正确 那B选项就是"对照组"的方式来支持此推论，对照组支持是以不同实验推出不同结果， 禁止用DDT(不同实验)所以使peregrine falcons增加(不同结果) 所以我选B选项 _____________________________________________________________________________ --

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