单项选择题
A.强度设计值≥235M Pa B.比例极限值≥235MPa C.抗拉强度值≥235MPa D.屈服点值≥235MPa
A.w<0. 60-/0 B.w<2.1% C.0. 6%～2.1% D.w>2.1%
A.0.6%B.0.25%C.0.15%D.0.1%
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