题目内容

粗车时,选择切削用量的顺序是()。

A. 背吃刀量、切削速度、进给量
B. 背吃刀量、进给量、切削速度
C. 切削速度、背吃刀量、进给量
D. 进给量、背吃刀量、切削速度

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He is an ( )driver and has a driving experience of more than 15 years.

A. experience
B. experienced
C. rude
D. shy

( ) the travel service and my colleagues, I'd like to extend a warm welcome to all of you.

A. Because of
B. In stead of
C. On behalf of
D. Since

If you have any problems or special requests, please don't( )to tell us.

A. care
B. afraid
C. worry
D. hesitate

It ( ) us about 20 minutes to get to the hotel, please have a short rest or enjoy the landscape out of the windows.

A. takes
B. makes
C. does
D. gets

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