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标题: [求助]TT GWD0-30-32 [打印本页]

作者: silviaqiu 时间: 2006-8-17 02:50
标题: [求助]TT GWD0-30-32

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?

The chemical spill five years ago occurred at a time when there were neither Merrick sea turtles nor Merrick sea turtle eggs on Baker’s Beach.
Female Merrick sea turtles begin returning to Baker’s Beach to lay their eggs when they are ten years old.
Under normal conditions, only a small proportion of hatchling female Merrick sea turtles survive in the ocean until adulthood and return to lay their eggs at Baker’s Beach.
Environmental pressures unrelated to the chemical spill have caused a significant decline in the population of one of the several species of sea birds that prey on Merrick sea turtle eggs.(B)
After the chemical spill, an environmental group rejected a proposal to increase the Merrick sea turtle population by transferring eggs from Baker’s Beach to nearby beaches that had not been affected by the spill.

这道题完全不明白什么意思

作者: dori0214 时间: 2006-8-17 08:00

我也同问，科学家的预测是：全球这种乌龟的数量将减少，即使母乌龟10岁之后游回来下蛋（虽然能解释来下蛋的母乌龟没有减少），但是并不能反驳科学家的预测，我还是感到d好一点

[此贴子已经被作者于2006-8-17 11:02:58编辑过]

作者: tinaleo 时间: 2006-8-17 08:09

我也觉得选E，因为不管FEMALE TURTLES几岁来产卵，至少还是说明化学污染没有影响到它们这里产卵啊。

作者: liquid_84 时间: 2006-8-17 10:57

http://forum.chasedream.com/dispbbs.asp?boardID=24&ID=187875&page=1

silviaqiu请看这个连接

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