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?

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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?

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?
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?

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?
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.

我不同意楼主,the speed that light travels at...才说的过去
1楼的说法是有道理地,顶一个

A以。。。
光以某速度传播
speed 并不是交通工具