Some metals are better conductors of electricity than others,______ means that the former has atoms that contain more free elect

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问题 Some metals are better conductors of electricity than others,______ means that the former has atoms that contain more free electrons than the latter.

选项 A、that
B、this
C、it
D、which

答案D

解析 本题考非限制性定语从句的用法。根据句意,故D项正确。本句大意为:一些金属比其他金属的导电性能要好。这说明前者的原子中比后者含有更多的自由电子。
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