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问题详情

平面汇交力系平衡的几何条件是

A、力多边形自行封闭

B、力多边形成圆形

C、力多边形成正方形

D、力多边形成三角形

时间：2021-07-17 23:55 关键词：建筑环境与能源应用工程专升本建筑工程力学 2020级第一学期期末考试

答案解析

A

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