求助：GWD30-Q32

gmatao

答案是B，我也看过了以前的讨论还是没有方向，请路过的给传道解惑一下呀，谢谢！

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?

 

A.      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.

B.       Female Merrick sea turtles begin returning to Baker’s Beach to lay their eggs when they are ten years old.

C.      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.

D.      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.

E.       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.

naonao7949

乌龟10岁才回去产卵，而spill发生在5年以前，说明那些乌龟还没有受到影响，他们是10年前出生的

34cocorate

up

没有人

还是不懂

mars_cheung

五年前发生的意外，但海龟要 10 年后才下蛋。所以现在看到下蛋的海龟多就去推断五年前的意外没造成影响是不正确的。发生意外时受影响的海龟还没到时间下蛋呢。

B

ryanrui

五年前发生的意外，但海龟要 10 年后才下蛋。所以现在看到下蛋的海龟多就去推断五年前的意外没造成影响是不正确的。发生意外时受影响的海龟还没到时间下蛋呢。
B

-- by 会员 mars_cheung (2009/10/31 17:18:00)

说得太好了～～～～～～～一看就明白了～谢谢

gracezz

这题A咋回事？

20082010

这题主要看是怎么理解：

1）如果spill只影响刚出生的小龟，那么我同意mars_cheung， 小龟们还没有长大，目前下蛋的海龟（10岁）比没有受到影响
2）如果spill影响的是所有的海龟，或者说海龟繁殖能力都受到严重影响，D为他因导致好像更说得过去。

Open to discussion!

林若绮

我觉得把，这个题是问undermines the argument offered in refutation of the environmentalists’ prediction, 题目的refutation of environmentalist's prediction，是说因为5年前的returning female adult数目增加，所以海龟数目不会减少。
因此反驳应该针对returning female adule. 选项D说明了，chemical will affect the future returning female adult.
选项D是与returning female adult即argument's refutation无关的选项。

tracymygod

这题主要看是怎么理解：

1）如果spill只影响刚出生的小龟，那么我同意mars_cheung， 小龟们还没有长大，目前下蛋的海龟（10岁）比没有受到影响
2）如果spill影响的是所有的海龟，或者说海龟繁殖能力都受到严重影响，D为他因导致好像更说得过去。

Open to discussion!

-- by 会员 20082010 (2010/6/28 5:24:41)

对啊 我也在考虑是不是因为那个什么破坏栖息地的原因 看来是扩大考虑范围了 它只说到蛋不能孵化 不能去联想其它的影响