Having walked in the desert for several days, we felt exhausted, but we had to find a pool before the

water we had in the bottle________.[ ]

A. ran out of  

B. ran away

C. ran out  

D. ran off

斜轴式柱塞泵倾角最大可达（）度，故变量范围较广。

A.20

B.30

C.40

D.50