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标题: PREP07第一道题CR 选项看不懂求解惑 [打印本页]

作者: 六月的水蜜桃 时间: 2014-6-18 10:53
标题: PREP07第一道题CR 选项看不懂求解惑

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

Although fullerenes--sphericalmolecules made entirely of carbon--were first found in the laboratory, theyhave since been found in nature, formed in fissures of the rare mineralshungite. Since laboratory synthesis offullerenes requires distinctive conditions of temperature and pressure, thisdiscovery should give geologists a test case for evaluating hypotheses aboutthe state of the Earth's crust at the time these naturally occurring fullereneswere formed.

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

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

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

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

(E) Shungite itself is formed onlyunder distinctive conditions.‘’

答案是D，我看了很多解答依然没有理解。
很多人说因为D是unknow, 割裂了关系。可是本来文章的结论就是要通过natural fullerenes去推测crust state，如果以前的structure已经知道了，那还有什么好推测去evaluate的？

作者: brfmzbjz 时间: 2014-6-28 15:30
把题干前几个词放到bing去搜索
然后去看manhattan论坛外国老师的讲解

作者: 山贼的头头 时间: 2014-6-28 18:59
D说明它的晶体排列和实验室的发现的不一现，也就说明自然界的这种物质的生成并不一定需要具备实验室里一样的条件，从而实验室里的严格的条件不一定可以作为参考。所以削弱。我一开始在B和D徘徊的。其实如果B里如果没有some这个词也是对的了。。我一开始没注意到。

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