求助GWD3-Q38~~~

carvinhuang

Kate:  The recent decline in numbers of the Tennessee warbler, a North American songbird that migrates each fall to coffee plantations in South America, is due to the elimination of the dense tree cover that formerly was a feature of most South American coffee plantations.
Scott:  The population of the spruce budworm, the warbler’s favorite prey in North America, has been dropping.  This is a more likely explanation of the warbler’s decline.

Which of the following, if true, most seriously calls Scott’s hypothesis into question?

A.The numbers of the Baltimore oriole, a songbird that dose not eat budworms but is as dependent on South American coffee plantations as is the Tennessee warbler, are declining.

B.The spruce-budworm population has dropped because of a disease that can infect budworms but not Tennessee warblers.

C.The drop in the population of the spruce budworm is expected to be only temporary.

D.Many Tennessee warbler have begun migrating in the fall to places other than traditional coffee plantations.

E.Although many North American songbirds have declined in numbers, no other species has experienced as great a decline as has the Tennessee warbler.

正确答案是A，我选了C

求助：我非常费解~~~~~~~
题目不是要削弱S的假设吗？

S是说那种鸟的减少是因为budworm，要削弱的话，证明鸟的减少跟budworm没关系~~

可是A项说：举了另外一种鸟，它也减少了，但是它不吃budworm。
这跟削弱S说的话有什么关系？！！A项举的例子，是因为它不吃budworm才能证明，它的减少是跟咖啡园有关，可是文中说的warbler是吃budworm，又怎么 能通过那个例子，得出warbler的减少不是因为budworm的减少呢？

carvinhuang

Kate:  TW的数量下降，这鸟秋天从北美飞到南美，因为什么树的密度限制什么的。
Scott:  SB的数量下降, SB是TW的食物在北美（TW吃SB）
关于TW数量下降的原因，TW数量降不降，鸟飞不飞，SB数量降不降，吃不吃SB

问驳斥Scott

A.The numbers of the Baltimore oriole, a songbird that dose not eat budworms but is as dependent on South American coffee plantations as is the Tennessee warbler, are declining.另外一种鸟，不吃SB但是又怎么独立什么与TW有关系了，那种鸟下降了。说这鸟吃不吃SB，有点沾边，先放着

B.The spruce-budworm population has dropped because of a disease that can infect budworms but not Tennessee warblers.SB数量下降的原因是因为疾病影响b不影响TW，这里讨论的是SB数量下降的原因，疾病影不影响，不沾边，干掉

C.The drop in the population of the spruce budworm is expected to be only temporary.SB数量下降只是暂时的，说SB的数量变化是不是暂时的，文章没有说，干掉

D.Many Tennessee warbler have begun migrating in the fall to places other than traditional coffee plantations.很多TW开始在秋天迁徙去别的地方，说目的地，跟数量下降的原因没什么关系，干掉

E.Although many North American songbirds have declined in numbers, no other species has experienced as great a decline as has the Tennessee warbler.虽然北美的这鸟数量下降，没有其它物种有像tw这样大量的下降，说其它物种去了，文章没提，干掉


所以只能选A，并且往往正确答案有种感觉，就是选项前面说了一个与原来的文章没什么关联的东西，然后后面说了这东西跟原文的联系，这种感觉比较像正确选项。

呵呵

-- by 会员 sdfzcjy (2011/3/23 13:20:14)

 呵呵，谢谢~~~~  你好高深啊~~

carvinhuang

求助~~有人吗

carvinhuang

没人吗？

20110102

Scott's hypothesis assumed Warber came to coffee plantation for food. When the food is diminishing, they come here less frequently.
A questions this assumption by comparing Oriole. C only states a trend  of bud number and it has nothing to do with Warber's behavior.

carvinhuang

我还是不太明白楼上的解释~~~~~ 我觉得A只能支持Kate的解释，但是并不能削弱Scott的解释。因为A举了Oriole鸟不吃budworm，但是也下降了，只能证明咖啡园是逐渐在减少。但是并不能削弱Scott的解释——warbler鸟的减少时因为budworm的减少。。。

sdcar2010

In weakening type questions, you use information from the answer choices to provide counter evidence against the stated conclusion.  You do not need to kill the original argument.  Neither can you use outside information beyond what is stated in the stimulus and the answer choices.

Answer (A) is  a direct attack on Scott's idea that budworms are the source of the problem because answer (A) provides an example that a species that doesn't eat budworms (or, to put it another way, is not affected by the cause of change proposed by Scott) also experienced exactly the same decline. Therefore, answer (A) adds more credibility to Kate's theory and, at the same, casts more doubts on Scott's hypothesis.

sdfzcjy

Kate:  TW的数量下降，这鸟秋天从北美飞到南美，因为什么树的密度限制什么的。
Scott:  SB的数量下降, SB是TW的食物在北美（TW吃SB）
关于TW数量下降的原因，TW数量降不降，鸟飞不飞，SB数量降不降，吃不吃SB

问驳斥Scott

A.The numbers of the Baltimore oriole, a songbird that dose not eat budworms but is as dependent on South American coffee plantations as is the Tennessee warbler, are declining.另外一种鸟，不吃SB但是又怎么独立什么与TW有关系了，那种鸟下降了。说这鸟吃不吃SB，有点沾边，先放着

B.The spruce-budworm population has dropped because of a disease that can infect budworms but not Tennessee warblers.SB数量下降的原因是因为疾病影响b不影响TW，这里讨论的是SB数量下降的原因，疾病影不影响，不沾边，干掉

C.The drop in the population of the spruce budworm is expected to be only temporary.SB数量下降只是暂时的，说SB的数量变化是不是暂时的，文章没有说，干掉

D.Many Tennessee warbler have begun migrating in the fall to places other than traditional coffee plantations.很多TW开始在秋天迁徙去别的地方，说目的地，跟数量下降的原因没什么关系，干掉

E.Although many North American songbirds have declined in numbers, no other species has experienced as great a decline as has the Tennessee warbler.虽然北美的这鸟数量下降，没有其它物种有像tw这样大量的下降，说其它物种去了，文章没提，干掉


所以只能选A，并且往往正确答案有种感觉，就是选项前面说了一个与原来的文章没什么关联的东西，然后后面说了这东西跟原文的联系，这种感觉比较像正确选项。

呵呵

carvinhuang

In weakening type questions, you use information from the answer choices to provide counter evidence against the stated conclusion.  You do not need to kill the original argument.  Neither can you use outside information beyond what is stated in the stimulus and the answer choices.

Answer (A) is  a direct attack on Scott's idea that budworms are the source of the problem because answer (A) provides an example that a species that doesn't eat budworms (or, to put it another way, is not affected by the cause of change proposed by Scott) also experienced exactly the same decline. Therefore, answer (A) adds more credibility to Kate's theory and, at the same, casts more doubts on Scott's hypothesis.

-- by 会员 sdcar2010 (2011/3/23 11:33:47)

谢谢~~~~  似乎明白了~~~  就是说，A答案支持了K的说法，也就是说反驳了S说法。。~~