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【简答题】
图示齿轮-连杆组合机构,指出它的子机构,组合方式,画出组合框图。
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皮皮学刷刷变学霸
举一反三
【单选题】______ you have nothing important to do, why not come with me to the cinema?
A.
Since
B.
When
C.
For
D.
Because
【单选题】— Could you tell me ? — Yes. To take back my dictionary. [ ]
A.
why did you come here
B.
when do you come here
C.
why you came here
D.
when you come here
【单选题】_____ to ask me for help? [ ]
A.
Why don't come
B.
Why not come
C.
Why you don't come
D.
Why not to come
【单选题】Could you tell me ______ for the meeting yesterday? [ ]
A.
why did you come late
B.
why you came late
C.
why do you come late
D.
why have you come late
【多选题】以下关于绝缘油击穿电压检测，说法正确的是（）。
A.
电极间距离应为2.5mm正负0.05mm，要用标准规校准
B.
油中有水分及其他杂质时对击穿电压有明显影响，试样一定要摇荡均匀后注入油杯
C.
油杯不用时应清空，加盖，保存在干燥的地方，防止受潮
D.
将试样杯放入测量仪上，如使用搅拌，应打开搅拌器。测量并记录试样温度
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