She became the first black woman        to the Senate. [ ]

A.elected

B.being elected

C.to elect

D.to be elected

抢救时胸外心脏按压有效的标志是（）

A.颈动脉搏动

B.股动脉搏动

C.肱动脉搏动

D.颈、股动脉搏动

E.颈、肱动脉搏动