If you have to catch the first bus every day,choose this hotel.It is very________for the station-it's only a

twominute walk.[ ]

A. close  

B. certain

C. convenient  

D. distant

胆汁在营养素消化吸收中的主要作用是______。

A．乳化脂肪
B．水解淀粉
C．水解蛋白质
D．促进胃液分泌