题目

The temperature ________water begins to boil is 100 C.
A.in that B at which C in which D.at that
选哪个?为什么?还有这句话的意思

提问时间：2020-05-21

答案

选B.
你先想,
Water begins to boil at 100℃.
速度、以……速率、温度、在日落时、在……核心要用at.
然后这个从句要修饰temperature,把at挪到前面,要用到which,就变成了
The temperature at which water begins to boil is 100℃.