原长为100mm的试件，拉断后的长度为128mm，材料的断后伸长率（或延伸率）δ是28%。 -题库考试答案搜索网

原长为100mm的试件，拉断后的长度为128mm，材料的断后伸长率（或延伸率）δ是28%。

判断题

2021-07-18 13:47

A、正确
B、错误

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正确答案

A

试题解析

A

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