The room is not bright enough. I need to           a light on the ceiling.

A．put in

B．put on

C．put up

D．put with

鞣酸蛋白主要作用是（）。

A.补充电解质和水分

B.用于细菌感染性腹泻

C.修复消化道粘膜屏障

D.吸附有毒物质并阻止其吸收