• 2022-06-03
    图示力F的作用线在OABC平面内,此力对各坐标轴之矩为()。[img=566x480]17e0ba674f72d05.png[/img]
    A: Mx(F)≠0,My(F)≠0,Mz(F)≠0
    B: Mx(F)≠0,My(F)≠0,Mz(F)=0
    C: Mx(F)≠0,My(F)=0,Mz(F)=0
    D: Mx(F)=0,My(F)=0,Mz(F)=0