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问题 单项选择题

1951年至1952年，“五反”运动开展的领域是（）。

A.国营企业 

B.私营工商业 

C.党政机关 

D.合作社

答案

参考答案：B

单项选择题

Which of the following statements is the most appropriate title for the passage

Which of the following statements is the most appropriate title for the passage
A．The Origins of GPS
B．The Advantages of GPS
C．The Future of GPS
D．The Increasing Uses of GPS: Military and Civilian

A．The Origins of GPS

B．The Advantages of GPS

C．The Future of GPS

D．The Increasing Uses of GPS: Military and Civilian
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问答题 简答题

简述循环氢压缩机启动前必须具备的信号条件？
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