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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?
背景:fullerenes(我也不知道是啥)在实验室和自然中都被发现。
推导:在实验室中,F需要独特的温度和压力来形成à(此实验)可以用于衡量F在自然
中形成时的地壳状态
削弱:题干在建立两者的联系。削弱结论,则推导出结论的条件无法成立。
分析:实验室的现象不适用于自然界现象的研究。削弱实验与自然界间的联系,建立差异
读完题后就是在脑海中预测答案,这道题明白了,但我开始看的过快,把背景信息忽视了~~就奔着premise和conclusion 看了逻辑链能完整明白过来~~还是要对题干中的元素牢牢把握住才行
期待更新~~ |
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