What ___ luck! The children here live ____happy life.

A．\; the

B．a; the

C．a; \

D．\; a

手术前晚通便灌肠的意义()

A．防止手术中呕吐而引起窒息

B．使消化道适当休息

C．防止手术野污染

D．防止或减轻术后腹胀

E．防止手术后并发症的发生