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A major chemical spill occurred five years ago at Baker's Beach, the world's sole nesting ground for Merrick sea turtles, and prevented nearly all the eggs laid that year from hatching. Yet the number of adult female Merricks returning to lay their eggs at Baker's Beach has actually increased somewhat since five years ago. Clearly, environmentalists' prediction that the world's Merrick population would decline as a result of the spill has proven unfounded.

Which of the following, if true, most seriously undermines the argument offered in refutation of the environmentalists' prediction?

正确答案: B

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GWD-29-32请教解题思路

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楼主
发表于 2005-11-10 21:12:00 | 显示全部楼层
B
沙发
发表于 2005-11-11 10:12:00 | 显示全部楼层

5年前,化学污染导致乌龟蛋[乌龟下蛋唯一的地点]不能孵化,但是5年来,去那里下蛋的母乌龟数量在上升。两者矛盾,因此环境学家认为由于化学污染导致乌龟数量下降的结论是错误的。


问:反对环境学家的论点。


乌龟一般在10岁之后才去下蛋[暗示:增长的乌龟数量是10年前的,与5年前的污染没有关系]



另外,你这个gwd-29有没有电子版本,给大家分享一下阿,shouhai@tom.com  谢谢!

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