建筑钢材的伸长率与 ( )标准拉伸试件标距间长度的伸长值有关。-查字典考试网

建筑钢材的伸长率与 ( )标准拉伸试件标距间长度的伸长值有关。

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建筑钢材的伸长率与 ( )标准拉伸试件标距间长度的伸长值有关。

A、到达屈服应力时
B、到达极限应力时
C、试件断裂瞬间
D、试件断裂后

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