滚动支座只能提供垂直于支座放置平面的反力。A:错 B:对 答案: 对A:0.125m,1.000m B:0.100m,1.000m C:0.125m,0.800m D:0.125m,0.833m 答案: 0.125m,0.833m 点我阅读全文