A.0.5mB.0.8mC.1mD.1.1m
A.最小应力值 B.最大应力值 C.最大剪力值 D.最小剪力值
A.主梁 B.副梁 C.工作钢丝绳 D.安全钢丝绳
A.1/3 B.1/4 C.1/5 D.1/6
A.6m B.8m C.10m D.12m