题目18.如图所示,固定端A的约束力为 () 。-|||-(A) _(Ax)=F ,_(A)y=0 , _(A)=0 (B) _(Ax)=F, ,_(A)y=0 ,_(A)=Fa-|||-(C) _(Ax)=F ,_(A)y=0 , _(A)=Fl (D) _(Ax)=0 , _(Ay)=F ,_(A)=Fa题目解答答案B. ${F}_{Ax}=F$ , ,${F}_{A}y=0$ ,${M}_{A}=Fa$
