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LSAT 12-2-11 weaken

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楼主
发表于 2003-6-8 23:31:00 | 只看该作者

LSAT 12-2-11 weaken

11. Logging industry official: Harvesting trees from old-growth forests for use in manufacture can reduce the amount of carbon dioxide in the atmosphere, since when large old trees die in the forest they decompose, releasing their stored carbon dioxide. Harvesting old-growth forests would, moreover, make room for rapidly growing young trees, which absorb more carbon dioxide from the atmosphere than do trees in old-growth forests.

Which one of the following, if true, most seriously weakens the official's argument?

(A) Many old-growth forests are the home of thousands of animal species that would be endangered if the forests were to be destroyed.
(B) Much of the organic matter from old-growth trees, unusable as lumber, is made into products that decompose rapidly.
(C) A young tree contains less than half the amount of carbon dioxide that is stored in an old tree of the same species.
(D) Much of the carbon dioxide present in forests is eventually released when wood and other organic debris found on the forest floor decompose.
(E) It can take many years for the trees of a newly planted forest to reach the size of those found in existing old-growth forests.

答案是B。不知是何原因。谢谢!
沙发
发表于 2003-6-8 23:39:00 | 只看该作者
原文说因为老树在树林里面死了后DECOMPOSE,放出CO2。。。结论是:用老树来制造东东就可以减少CO2的排放

B的削弱老树的ORGANIC MATTER也会DECOMPOSE,放出CO2。。达不到目的了。
板凳
发表于 2003-6-9 00:11:00 | 只看该作者
Siebel,

what do you think the answer should be?
地板
 楼主| 发表于 2003-6-9 00:20:00 | 只看该作者
谢谢albert mindfree。现在明白了我的问题是没有读明白原题。我读了几遍,都觉得题目是在说要砍伐森林种新树,结论误以为是种新树好,而忽略了首句。结果就是觉得哪个都不是answer

谢谢!
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