选择题：退火亚共析钢,随含碳量的增加( )(本题1.0分)A、 HBS、σb值减小,δ、aK值增加B、 HB

题目内容：

退火亚共析钢,随含碳量的增加( )(本题1.0分)
A、 HBS、σb值减小,δ、aK值增加
B、 HBS、σb值增加,δ、aK值减小
C、 HBS、σb值增加,δ、aK值增加
D、 HBS、σb值减小,δ、aK值减小

参考答案：

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