单项选择题
A.破坏 B.变形 C.弯曲 D.疲劳
A.2100g B.1990g C.2095g D.1920g
A.2.665 B.2.600 C.2.535 D.1.950
A.45.6% B.26.4% C.23.8% D.33.2%
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