※ 引述《surfingdream (GMATing)》之銘言： : ※ 引述《kimoqueen (AT苦海何時能解脫~ @_@)》之銘言： : : 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 但我選B : 這題重點是要支持 科學家的claim：DDT是大量使用在 rural areas : (A)選項 把not去掉，即DDT是用在重工業的地方，反駁郊區，加上not剛好是支持 : 不過這個選項也有點缺陷，因為他也沒提到 rural areas是否就沒有重工業.... : (B)即使population穩定成長，還是不足以支持DDT是用在郊區 這題我也選B 這題主要是由果推因，若"peregrine falcons數量下降"視為B "廣泛使用DDT"視為A 若B-->A 是正確 那B選項就是"對照組"的方式來支持此推論，對照組支持是以不同實驗推出不同結果， 禁止用DDT(不同實驗)所以使peregrine falcons增加(不同結果) 所以我選B選項 _____________________________________________________________________________ --

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