A: I enjoyed the performance very much.

B: Yes, it was really good. I think               boy in white was the best actor.

A．a

B．an

C．the

D．/

足月妊娠孕妇，终止妊娠前下列检查必要的是（）

A.超声波检查，测量双顶径

B.详细询问病史，确定胎龄

C.胎盘功能测定

D.X线骨盆测量

E.胎儿成熟度检查