氮化硅陶瓷材料:求助！！英语选择题

来源：百度文库 编辑：查人人中国名人网 时间：2024/05/03 02:29:14
Important () his discovery was, it was regarded as a matter of no account in his time.
A.to B.for C.as D.although
D项为什么不可以？

C
as在这里表虽然的意思，需要用倒装句型，把表语important提前。although不倒装。

B
D项因为although是放在句首的且意思不符

B

A

B

C

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