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【简答题】
正线信号系统提供()、()和( 连锁列车控制 )三个列车控制等级。
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【单选题】听力原文：M: Hi, Cathy. I am here because I visited caves all over North America. Since you are going to study cave formations, Dr. Bow asked me to come to share some of my experiences with you. W: Hi, Bil...
A.
He was asked to leads group of inexperienced carets there.
B.
It was the first cave that he had ever visited.
C.
Clearly marked trails made it easy to explore.
D.
lie hoped to make a discovery.
【单选题】Why did Belser send Jack his gold watch?
A.
Because he was grateful for Jack' s time with him.
B.
Because he had no children or relatives.
C.
Because he thought he had to keep his word.
D.
Because Jack had always wanted it during his childhood.
【简答题】A．Because his boss forces him to get a lot of work done. B．Because he enjoys working himself. C．Because he has to earn an adequate wage. D．Because he wants to create a good impression on his boss.
【简答题】孕妇腹部检查时测量两项内容:耻骨联合上端到宫底的距离为( );平脐绕腹1周的数值为( )
【单选题】The squadron of Japanese car salesmen is reducing because of ______.
A.
a labor shortage
B.
higher expectations among Japan's workforce
C.
high cost land
D.
both A and B
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