all living things are made up of cells,______we have learned before.A.that B.which C.as D.what为什么用as而不用which

分类: 作业答案 • 2021-12-19 16:31:18

问题描述：

all living things are made up of cells,______we have learned before.
A.that B.which C.as D.what
为什么用as而不用which

答

as 和which 作关系代词时都可以代替整个主句,但如果有“正如.一样”,一般用as,如此句“正如我们说学过的那样”,故不用which
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