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题库 / Prep2007E1-CR-1
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?
Confirming that the shungite genuinely contained fullerenes took careful experimentation.
Some fullerenes have also been found on the remains of a small meteorite that collided with a spacecraft.
The mineral shungite itself contains large amounts of carbon, from which the fullerenes apparently formed.
The naturally occurring fullerenes are arranged in a previously unknown crystalline structure.
Shungite itself is formed only under distinctive conditions.
The naturally occurring fullerenes are arranged in a previously unknown crystalline structure.
unknown crystalline structure. 这个玩意的性质和实验室的不一样，可能生成的时候，导致的因素就不一样，因而不能探测the state of the Earth's crust at the time
B Some fullerenes have also been found on the remains of a small meteorite that collided with a spacecraft. 是have also been found，不是说实验室外的这个东西，都是陨石什么的，外太空来的。在shungite里头，科学家想分析的那些 fullerenes还是在的，这玩意你得解决，它到底能不能反应当时地球的状态
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