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冷弯性能是通过检验试件经规定的弯曲变形后，弯曲处是否有（）等情况来评定的。

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冷弯性能是通过检验试件经规定的弯曲变形后，弯曲处是否有（）等情况来评定的。

A: 裂纹
B: 颈缩
C: 起层
D: 鳞落
E: 断裂

请帮忙给出正确答案和分析，谢谢！

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