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． 5.某轴材料为低碳钢，工作时发生弯扭组合变形，对其进行强度计算时，宜采用()。

A、第一或第二强度理论

B、第二或第三强度理论

C、第一或第四强度理论

D、第三或第四强度理论

时间：2021-09-02 00:21 关键词：现代兴业兰州理工大学工程管理建筑力学(1)

答案解析

D

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