单选The content of carbon of medium carbon steel is --?
A、A 0.008wt%-0.25wt%;
B、B 0.25wt%-0.60wt%;
C、C 0.60wt%-2.14wt%;
D、D 2.14wt%-6.70wt%
发布时间：2025-02-23 00:09:54
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答案：B 0.25wt%-0.60wt%
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