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【单选题】
应用戴维南定理可以把一个有源二端网络化一个等效的()A.
理想电压源;
B.
电流源;
C.
实际电压源;
D.
理想电流源;
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反馈参考答案：
举一反三
【判断题】If a welder knows nothing about stress and strain, his welding job would always fail.
A.
正确
B.
错误
【单选题】. --- Could you fetch me my glasses from the kitchen? ---__________.
A.
It’s a pleasure
B.
At your service
C.
It doesn’t matter
D.
That’s my pleasure
【简答题】摇摆阻尼器(用于感量为0.1mg的阻尼天平的专用零件)
【简答题】摇摆阻尼器(用于感量为0.1毫克的阻尼天平的专用零件)
【单选题】—Could you fetch me my glasses from the study? — ________.
A.
Sure, no problem.
B.
I'm afraid not.
C.
That's impossible.
D.
It doesn't matter.
【单选题】—Could you fetch me my glasses from the study? — ▲ .
A.
I’m afraid not.
B.
Sure, no problem.
C.
It doesn’t matter.
D.
That’s impossible.
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