100℃ is the temperature which water will boil.A. forB. atC. onD. of

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A. for
(答案→)B. at
C. on
D. of
解析：此处是介词前置的定语从句，temperature是先行词，根据介词短语at the temperature可知用at which，which代替temperature。句意：100度是水沸腾的温度。
【考点定位】考查介词的用法。