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问题 判断题

当压缩空气从喷枪的喷嘴吹出时，在喷嘴口区域形成负压区，构成把涂料从喷枪的漆路压送到喷嘴处的条件，涂料被汲到喷嘴处，继而被吹散成雾状，均匀地喷涂到工件表面。( )

答案

参考答案：对

阅读理解

Every morning Tom goes to work by train. He has a long way to go. So he always buys a newspaper. It helps him to spend the time on the train. Tom likes sport very much. One morning on the train he is reading something about the football match. So he forgets to get off the train at his station. He doesn’t know it. When he finishes reading, he looks out of the window. It’s far from his station. He gets off at the next station. He has to go back by train. Of course, he is late for work.

小题1:Tom goes to work by ___.  

A．train

B．bike

C．car

D．bus小题2:Tom likes ____.

A．reading

B．sport

C．music

D．working小题3:Tom’s work place is _______ his home.

A．near

B．far from

C．beside

D．behind小题4:What does Tom buy every morning?

A．a book

B．a football

C．a hamburger

D．a newspaper小题5:Where does he get off the train at last?

A．the right station

B．the next station to his work place

C．before the train station

D．we don’t know
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单项选择题

LKD1-T型车站列控中心LEU至应答器之间的C接口，传送的是564.48kb/s的基带差分两相调制信号DBPL和（）的正弦波叠加在一起的信号。

A.8.3kHz

B.8.8kHz

C.9.1kHz

D.9.8kHz
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