缓和曲线的作用主要是在缓和曲线范围内其半径逐渐变小，使车辆产生的离心力逐渐减小。
参考答案：错
- Could I have some of your water?
- Certainly,_______. [ ]
A. give you.
B. here are you.
C. here you are.
D. thanks very much.
如何切换离心泵？
