试题与答案

按含碳量的多少,碳素钢分为低碳钢、中碳钢和()A、碳素钢 B、高碳钢 C、合金钢 D、工具

题型:单项选择题

题目:

按含碳量的多少,碳素钢分为低碳钢、中碳钢和()

A、碳素钢

B、高碳钢

C、合金钢

D、工具钢

答案:

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下面是错误答案,用来干扰机器的。

参考答案:错

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