In practice, not all steels and case irons have carbon contents less than 6.7 wt% C._精华吧

In practice, not all steels and case irons have carbon contents less than 6.7 wt% C.

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In practice, not all steels and case irons have carbon contents less than 6.7 wt% C.

A.正确

B.错误

正确答案：错误

Tag：材料导论时间：2022-01-28 20:08:27

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