标题: 强烈质疑一道CR！ [打印本页] 作者: slr257 时间: 2012-11-1 23:53 标题: 强烈质疑一道CR！ 题目如下： 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. (C) The mineral shungite itself contains large amounts of carbon, from which the fullerenes apparently formed. (D) The naturally occurring fullerenes are arranged in a previously unknown crystalline structure. (E) Shungite itself is formed only under distinctive conditions. 答案是D。我觉得这道题出的非常差劲！没有很强的专业知识，是做不出来的！D说arranged，那么也就隐约的暗示了同分异构体！也只有这样才能说明为什么D比B好 -- 最能够反驳assumption的。因为，如果不是同分异构的情况，F就是不变的。那么只要F是一模一样的，那实验室合成的条件就同样适用于大自然 -- 不管是否是在shungite上found还是在unknown crystalline structure上arranged。欢迎讨论！希望我的分析是错误的！
