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标题: [求助]请教一道题，prep里的 [打印本页]

作者: mf1213 时间: 2009-10-30 15:34
标题: [求助]请教一道题，prep里的

Q3. p1-cr 1. (24179-!-item-!-188;#058&000705)

Although fullerenes--spherical molecules made entirely of carbon--were first found in the laboratory, they have since been found in nature, formed in fissures of the rare mineral shungite. Since laboratory synthesis of fullerenes requires distinctive conditions of temperature and pressure, this discovery should give geologists a test case for evaluating hypotheses about the state of the Earth's crust at the time these naturally occurring fullerenes were formed.

Which of the following, if true, most seriously undermines the argument?

(A) Confirming that the shungite genuinely contained fullerenes took careful experimentation.

(B) Some fullerenes have also been found on the remains of a small meteorite that collided with a spacecraft.

(D) The naturally occurring fullerenes are arranged in a previously unknown crystalline structure.

(E) Shungite itself is formed only under distinctive conditions.

我不大理解这道题究竟想讲什么，是从实验室的那些conditions就可以类比得到地壳的环境吗？

请牛人赐教，不胜感激！

作者: mf1213 时间: 2009-10-31 00:29
哎哟喂我可真是帖子毒药

作者: 大米花 时间: 2009-10-31 01:01
我小白试分析一下.
大自然合成的fullerenes都是在 fissures of the rare mineral shungite中,因为在实验室模拟合成fullerenes需要特定的temperature and pressure,因此当时大自然合成fullerenes过程也需要相同的temperature and pressure,由此可以推断当时的state of the Earth's crust

作者: 大米花 时间: 2009-10-31 01:06
http://www.manhattangmat.com/forums/although-fullerenes-spherical-molecules-made-entirely-of-t912.html
这是解释,觉得解释的挺对的,我就选了slightly weakens

作者: mf1213 时间: 2009-10-31 09:21

谢谢楼上好心的mm~哈哈~

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