允许速度不超过160Km/h的线路，道岔尖轨尖端的轨距加宽，按不大_爱下问搜题

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问题单项选择题

允许速度不超过160Km/h的线路，道岔尖轨尖端的轨距加宽，按不大于（）的递减率向始端基本轨接头递减。

A、2%

B、4%

C、6‰

D、8%

答案

参考答案：C

补全对话，情景问答

选出下列各句的答语。

( ) 1. Whose bag is this?
( ) 2. How much is this watch?
( ) 3. Where will they go on vacation?
( ) 4. Show me your picture, Tom.
( ) 5. What do you want to do?
( ) 6. Will she go to the Beijing Zoo next week?
( ) 7. What about this book?
( ) 8. Have a nice trip.
( ) 9. Which row is he in?
( ) 10. How old is your sister?

A. She is twelve years old.
B. Thank you very much.
C. It's 200 yuan.
D. It's Jim's.
E. Row Five.
F. I like it a lot.
G. They will go to Dalian.
H. OK. Here you are.
I. I want to play tennis.
J. Yes, she will.

选择题

The boy started _______ English three years ago.[ ]

A. learns

B. learn

C. learned

D. learning