搜题请搜索小程序“爱下问搜题”
问题 多项选择题

列车无线调度电话的作用是什么？（）

A.替代有线电话，提供新的通话方式

B.防止行车事故，保证行车安全

C.在调度指挥上机动灵活，便于提高运输效率

D.遇有特殊情况，便于临时处理

答案

参考答案：B, C

选择题

Helping others is a habit, ________ you can learn even at an early age. [ ]

A. it  

B. that

C. what  

D. one
查看答案
补全对话，情景问答
完成对话，把正确选项的字母代号写在横线上。
A. That sounds good.
B. I have a TV set.
C. Where is it?
D. I don't have a computer.
E. Great. Let's play it.
Bob: Let's play computer games.
Tony:   1   Where is your computer?
Bob:   2   Do you have one?
Tony: No,  I don't.  3   Let's watch TV.
Bob: No,  it's boring.  Let's play tennis.  I have a tennis racket.
Tony: Good.   4   
Bob: On the sofa.  Do you have a racket?
Tony: No,  I don't.  But your sister has one.
Bob: That's right.  And she has a tennis ball.
Tony:   5   
查看答案