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标题: 今天被lsat搞晕了! [打印本页]

作者: 1stzhang    时间: 2002-11-16 22:16     标题: 今天被lsat搞晕了!

今天开始做lsat的上册,不知什么原因有一种说不出的恐惧感!老是那不准!!!
请教一题:第四套 section1 12题
12. Impact craters caused by meteorites smashing into Earth have been found all around the globe, but they have been found in the greatest density in geologically stable regions. This relatively greater abundance of securely identified crater in geologically stable regions must be explained by the lower rates of destructive geophysical processes in those regions.

The conclusion is properly drawn if which one of the following is assumed?

(A) A meteorite that strikes exactly the same spot as an earlier meteorite will obliterate all traces of the earlier impact.

(B) Rates of destructive geophysical processes within any given region vary markedly throughout geological time.

(C) The rate at which the Earth is struck by meteorites has greatly increased in geologically recent times.

(D) Actual meteorite impacts have been scattered fairly evenly over the Earth's surface in the course of Earth's geological history.

(E) The Earth's geologically stable regions have been studied more intensively by geologists than have its less stable regions.   

如果可以的话请用相关、无关的方法指点我!谢谢各位了[em01]
作者: zyh79    时间: 2002-11-16 23:03

我不怎么会有关无关法。
这题结论是说 abundance 能够通过the lower rates of destructive geophysical processes来解释。
这里有一个前提:就是impacts被平均分布的,否则abundance 就可以通过分布不均来解释了,排除它因




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