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? 推理过程:fullerenes在实验室和自然环境中都存在 因为laboratory synthesis of fullerenes要求distinctive conditions,因此可以用来推断自然中形成fullerenes的地壳的状态。 推理是由实验可以推自然状态,答案一定要讲实验和自然联系到一起 (A) Confirming that the shungite genuinely contained fullerenes took careful experimentation. 只是说确定自然中含有fullerenes需要认真实验,属于说东道西 (B) Some fullerenes have also been found on the remains of a small meteorite that collided with a spacecraft. 说别的东西上也有fullerenes和文章推理无关,属于无关新变量 (C) The mineral shungite itself contains large amounts of carbon, from which the fullerenes apparently formed. 只是说fullerenes怎样形成的,没有把实验和自然建立联系,属于说东道西 (D) The naturally occurring fullerenes are arranged in a previously unknown crystalline structure. 正确,关键词unknown说明在实验室是不可知的,所以无法用实验推自然 (E) Shungite itself is formed only under distinctive conditions. 文章说fullerenes,Shungite只是fullerenes存在的一个载体,和结论无关属于说东道西 |