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【单选题】
一个含独立电源、线性电阻和受控源的一端口,对外电路来说用一个电流源和电阻的并联组合的等效置换是( )原理。A.
B.
诺顿
C.
叠加
D.
替代
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举一反三
【单选题】听力原文：W: Morning. Gail. Did you enjoy your holiday in the country M: Yes. We had a great time. And some friends went along with us. W: Where did you stay In a hotel M: No. We camped in the mountains. W...
A.
In a farm house.
B.
In the open.
C.
At a hotel.
【简答题】调速阀是由 和节流阀 而成,旁通型调速阀是由 和节流阀 而成。
【简答题】Martin: We met last year at the exhibition. You don’t remember. Oh, 1———————— In fact, we are 2.——————————— your company, and have prepared some paperwork for further discussion with you. Lawrence: Th...
【简答题】Listen to a speech and fill in the missing information: Ensuring every child gets a great education.mp3: Hi everybody. I'm speaking with you from the DC Public Library in Anacostia, where I just met w...
【单选题】患者,女性,28岁,化脓性扁桃体炎,需注射青霉素,在做青霉素过敏性试验时患者出现过敏性休克,请问过敏性休克最早出现的症状是
A.
呼吸道症状
B.
消化道症状
C.
中枢神经系统症状
D.
循环衰竭症状
E.
泌尿道症状
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