lustrative example of the former

B.The latter is a large-scale version of the former

C.The former is a structural elaboration of the latter

D.The former is a fair approximation of the latter

参考答案： D

这是一道细节推导题。根据题干中的“the structure of liquid metals and the structure of glassy metals”可将本题的答案信息来源迅速确定在第三段的首句。该句中的“similar”一词暗示选项D是正确答案。考生在解题时应重视对立对比关系。

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5It can be inferred from the text that, theoretically, molten nonmetallic glasses assume a crystalline structure rather than an amorphous structure only if they are cooled

A.very evenly, regardless of the rate.

B.rapidly, followed by gentle heating

C.very slowly

D.to room temperature

参考答案： C

本题是一道总结归纳信息并进行引申推导题型。从本题题干中的“molten nonmetallic glasses”可断定本题的答案信息在本文第二段，因为该句中包含有题干中的核心词语“molten nonmetallic glasses”。我们需要归纳和总结本段的每一句话，尤其是第三、四句的内容，另外本段尾句的含义为推导（infer）出本题的正确选项C起到至关重要的作用。考生在破解此类题型时一定要注意首先归纳和总结原文中相应出题点的全面信息，更要注意逻辑推导的能力。

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