单选题合金钢中合金元素的总含量( )为低合金钢。
A.3%
A.3%
A.3%
B.6%
B.6%
B.6%
C.9%
C.9%
C.9%
D.12%
D.12%
D.12%
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参考答案A---------------------------------
[华图解析]暂无解析