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

问题补充：

100℃ is the temperature which water will boil.

A. for

B. at

C. on

D. of

答案：

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。