_____ new cure for this disease that medical experts have recently developed proves to be ______ most effective, although it can not completely kill all the viruses.

A．A; a

B．The; /

C．/; the

D．A; the

闭式胸腔引流拔除时，应当嘱病人（）

A.深吸气后屏气

B.深呼气后屏气

C.浅呼吸后屏气

D.浅呼吸后屏气

E.正常呼吸