【单选题】5 / 9平面直角坐标下,力矩解析式为?AMO(F)=xFy−yFxM_O(F)=xF_y-yF_xMO(F)=xFy−yFx正确BMO(F)=xFx+yFyM_O(F)=xF_x+yF_yMO(F)=xFx+yFyCMO(F)=Fx+FyM_O(F)=F_x+F_yMO(F)=Fx+FyDMO(F)=Fd2M_O(F)=Fd^{2}MO(F)=Fd2参考答案A参考解析MO(F)=xFy−yFxM_O(F)=xF_y-yF_xMO(F)=xFy−yFx。