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传感器一般由 、 和基本转换电路组成
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【单选题】与连杆机构相比,凸轮机构的最大缺点是
A.
点、线接触,易磨损。
B.
设计较为复杂。
C.
惯性力难以平衡。
D.
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A.
given out
B.
looked out
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sold out
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come out
【单选题】与连杆机构相比,凸轮机构的最大缺点是
A.
惯性力难以平衡
B.
点、线接 触,易磨损
C.
设计较为复杂
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不能实现间歇运动
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【单选题】打开D:\ZG\JJ.QPR 查询文件,正确的命令是( )
A.
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MODIFY  QUERY  D:\ZG\JJ
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