汽车油罐车的装油臂有（）方式和气压传动方式2种。
A.自动操作
B.手工操作
C.液压传动
D.水压传动
参考答案：B
-________ do you want some money?
-Because I want to buy some fireworks.[ ]
A. Why
B. When
C. What
D. How
何谓择伐,择伐的选用条件?
