请教一道题，急

Joseph_lin · 发表于 2011-6-6 00:00:06

Grazing livestock on public land in the western United States is not causing widespread environmental damage in the region, since if it were, the condition of that land would not be improving. However, only 14 percent of public land in the area today is considered to have inadequate vegetation cover and, therefore, to be in poor condition, while in the 1930's, 36 percent had inadequate vegetation cover.

Which of the following, if true, most seriously weakens the argument above?

A) In the western United States, private land is typically more lush than public land, and cattle that graze on prive land can be fattened more quickly.

B) Since the 1930's, recreational users of public land in the western United States have caused more environmental damage than have the cattle grazing there.

C) During the 1930's, an unusually destructive dtrought prevailed thoughout the region where most public lands in the western United States are located.

D) Ranchers who use public land in the western United States pay only a fraction of what is paid by those who lease comparable private land for grazing.

E) The amount of land purchased by the United States government since the 1930's is relatively insignificant.

答案是C，应该是它因削弱，但是我一开始做的时候觉得是支持项，支持了30年代，有36%的土地没有被全部覆盖，请问，做削弱题的时候，如何很好的区分开它因削弱和支持项？

camelo777 · 发表于 2011-6-6 09:50:37

削弱和支持应该还是比较好区分的，关键是找对题目中的结论，你要知道题目问的是什么，那么自然可以区分开削弱和支持，如果你没搞清楚题目真正的中心，有可能就误选

pygmysog · 发表于 2011-6-6 14:19:52

其实这道题我读的时候没看太懂，但是用排除法也得到了C，楼主可以借鉴一下。
Grazing livestock on public land in the western United States is not causing widespread environmental damage in the region, since if it were, the condition of that land would not be improving.
However, only 14 percent of public land in the area today is considered to have inadequate vegetation cover and, therefore, to be in poor condition, while in the 1930's, 36 percent had inadequate vegetation cover.

Which of the following, if true, most seriously weakens the argument above?

A) In the western United States, private land is typically more lush than public land, and cattle that graze on prive land can be fattened more quickly.
[irrelevant, 根本就没拿private 和 public 作比较]
B) Since the 1930's, recreational users of public land in the western United States have caused more environmental damage than have the cattle grazing there. [irrelevant, 文章既没题recreational也没说要拿他们和grazing比较]

C) During the 1930's, an unusually destructive dtrought prevailed thoughout the region where most public lands in the western United States are located. [觉得差不多是这个意思，可以先放着，要是后面还有排除不了的，再回过头来看]

D) Ranchers who use public land in the western United States pay only a fraction of what is paid by those who lease comparable private land for grazing. [irrelevant, 没提钱的事儿，也没说要lease]

E) The amount of land purchased by the United States government since the 1930's is relatively insignificant. [扯得更远了]

请教一道题，急

所属分类: GMAT考试

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