1. (24179-!-item-!-188;#058&000705)
Althoughfullerenes--spherical molecules made entirely of carbon--were first found inthe laboratory, they have since been found in nature, formed in fissures of therare mineral shungite. Since laboratorysynthesis of fullerenes requires distinctiveconditions of temperature and pressure, this discovery should givegeologists a test case for evaluating hypotheses about the state of the Earth'scrust at the time these naturally occurring fullerenes were formed.
Which of thefollowing, if true, most seriously undermines the argument?
(A) Confirming thatthe shungite genuinely contained fullerenes took careful experimentation.
(B) Some fullereneshave also been found on the remains of a small meteorite that collided with aspacecraft.
(C) The mineralshungite itself contains large amounts of carbon, from which the fullerenesapparently formed.
(D) Thenaturally occurring fullerenes are arranged in a previously unknown crystallinestructure.（两者本质不同，无法类比）
(E) Shungite itself isformed only under distinctive conditions.
D是明白了，就是怎么觉得Ｅ也说得通，我是这么想的，shungite自己的形成过程就是很复杂的，那么在fulerenes的形成过程中，就无法判断复不复杂了，因为可能复杂的部分其实是shungite的形成过程，不知道哪里想错了，路过的ＮＮ帮忙解答一下吧，马上就要考了，还有就是怎么prep０７的cr讨论贴都找不到呢？ | 
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发表于 2011-8-18 16:35:06
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