A . 破坏时最大力为依据,且破坏的延伸率不小于4%B . 破坏时抗拉力为依据,且破坏的延伸率不小于4%C . 破坏时最大力为依据,且破坏的延伸率不小于5%D . 破坏时抗拉力为依据,且破坏的延伸率不小于5%
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