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
如下所示。