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钢材的含碳量越低,则()

单选题
2021-09-06 21:33
A、屈服台阶越短,伸长率也越短,塑性越差
B、屈服台阶越长,伸长率越大,塑性越好
C、强度越高,塑性越好
D、强度越低,塑性越差
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正确答案
B

试题解析

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