单项选择题
A.60mm B. 120mm C.180mm D.240mm
A. 轴心受压 B. 偏心受 C.受弯构件 D.受剪构件
A.5 B.6 C.7 D.8
A.0.1% B.0.2% C.0.5% D.0.6%
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