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能源装置是把( )转换成流体的压力能的装置,执行装置是把流体的( )转换成机械能的装置,( )是对液(气)压系统中流体的压力、流量和流动方向进行的装置。
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【单选题】我们目前所使用计算机采用的主要元器件是______。
A.
电子管
B.
晶体管
C.
中小规模集成电路
D.
大规模超大规模集成电路
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【多选题】普通型热电偶结构主要包括()。
A.
热电极
B.
绝缘子
C.
保护套管
D.
接线盒
【判断题】禁止把工具、夹具或工件放在车床床身上和主轴变速箱上。
A.
正确
B.
错误
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【简答题】完形填空 阅读短文,从每题所给选项中选出可以入空白处的最佳选项。(15分) Last week Lu visited England. He stayed with my grandmother. He said it was a strange visit. “I don’t understand, but I 16 your grandmother a lot. When I arrived,...
【简答题】阅读理解。 Holiday Ride A friend of mine named Paul received an expensive car from his brother as a Christmas present. On Christmas Eve when Paul came out of his office a street urchin (顽童) was walking aro...
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