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图示ABC为一边长为a的正三角形板，以三根斜杆1、2、3和三根竖杆4、5、6支承，板面上作用一力偶矩M，不计板重，则各斜杆内力相等，各直杆内力也相等，斜杆和竖杆的内力分别为（）。

时间：2021-12-26 02:27 关键词：第四章理论力学电气工程公共基础

答案解析

D

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