— Attention, please. The plane has to be _________ because of the foggy weather.

— Oh, bad luck! We have to wait now.

A．put on

B．put off

C．put up

D．put away

环枕畸形主要X线诊断方法为（）

A.脑室造影

B.CT检查

C.颅骨平片

D.血管造影

E.气脑造影