◎ 题干
A recent study showed how the temperature, ____ water freezes, can be changed using electric charges.

[     ]

A. at which
B. for which
C. in which
D. with which
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“A recent study showed how the temperature, ____ water freezes, can be changed using electric charges. [ ]A. at which B. for which C. in which D. with which …”主要考查了你对  【关系代词】【介词和介词短语】【非限制性定语从句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。