Obviously the measures taken by the local government have_______ the solution to drinking water problems in this region.

A．contributed to

B．referred to

C．turned to

D．devoted to

一体重为10kg小儿禁食4小时，施行肠套叠松解手术2小时。

手术创伤引起的液体转移及丢失量（）。

A.20ml/h

B.30ml/h

C.40ml/h

D.50ml/h

E.60ml/h