B.by which
by有通过某种方式/形式的意思.
常见by sea ,by road ,by air,by car,
这里by the speed of .也是同理.
The speed ______ light travels is said to be the maximum in the universe.
The speed ______ light travels is said to be the maximum in the universe.
A.in which B.by which C.from which D.with which
个人觉得应该是 at which,选什么好呢?
A.in which B.by which C.from which D.with which
个人觉得应该是 at which,选什么好呢?
英语人气：728 ℃时间：2020-04-04 18:32:49
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