【判断题】
没有高处作业证,未受过高处作业培训的人员,也可以参加高处作业。
A. 对
B. 错
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答案
B
解析
暂无解析
相关试题
【判断题】
沿着力的作用线方向移动的作用点,力的作用线仍在原来力的作用线的同一条直线上,而旋转中心到同一条直线的距离也不会改变,即臂力不变,所以力矩不变,受力物体的旋转动态也不会改变。
A. 对
B. 错
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