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【多选题】
某平面力系由一平面平行力系与一平面汇交力系组成(汇交点为A),若其中的平行力系简化为一个合力,且此合力作用线不通过A点,则有( )。A.
该一定不是平衡；
B.
该矢可能为零；
C.
该向某点简化的主矩可能为零。
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B.
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