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【单选题】
伺服系统是一个三闭环控制系统,其中速度控制是( )。A.
外环
B.
内环
C.
中环
D.
不确定
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反馈参考答案：
举一反三
【单选题】We would like you to know that we greatly your timely help .
A.
appreciate
B.
thank
C.
accept
D.
admire
【单选题】What we would like you to know is that we greatly ___________your timely help.
A.
compliment
B.
appreciate
C.
thank
D.
attach
【单选题】We would like you to send us details of your various ranges, sizes, colours and prices, and also samples of the different qualities of material used．
A.
include
B.
including
C.
conclude
D.
concluding
【单选题】Why are you advised to give fewer points in your presentation?
A.
To pass on the messages better.
B.
To avoid wasting too much time.
C.
To allow audience to take notes.
D.
To leave more time for questions.
【简答题】Why are you advised not to take any pirate or illegal taxi?
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