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【单选题】
附图页次1(6) 下面关于件1所用材料的解释哪一个是正确的?A.
是 DIN235规定的钢结构用的钢
B.
是最低抗拉强度为235 N/mm2的钢结构用的钢
C.
是含碳量为 0.23%的钢结构用的钢
D.
是屈服强度最低为235N/mm2的钢结构用的钢
E.
是合金组分为 2.3%的钢结构用的钢
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