右手螺旋法则：右手四指内屈，与扭矩转向相同，则拇指的指向表示扭矩矢的方向，若扭矩矢方向与截面外法线相同，规定扭矩为正，反之为负。 -题库考试答案搜索网

右手螺旋法则：右手四指内屈，与扭矩转向相同，则拇指的指向表示扭矩矢的方向，若扭矩矢方向与截面外法线相同，规定扭矩为正，反之为负。

判断题

2021-07-17 20:17

A、正确
B、错误

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正确答案

A

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