问题
选择题
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
答案
答案：A
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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：A
