道岔的作用是使机车车辆从一条轨道转入或越过另一条轨道,以满足铁路运输中的各种作业需要。
参考答案:对
找出与划线部分意思相近的选项。
1. You must do the homework first
A. need
B. should
C. can
2. We need plenty of water
A. lots of
B. lot of
C. many
3. Can you take the message for him? OK
A. give the message him
B. give him the message
C. gave him the message
4. There are more than eighty-six students in the class
A. on
B. about
C. over
5. We mustn't stay up every day
A. stand
B. to stay up
C. sit up
对犯罪分子,要在惩办的前提下宽大。( )