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【单选题】
希望提高放大器的输入电阻和带负载能力，应引入：A.
并联电压负反馈
B.
串联电压负反馈
C.
并联电流负反馈
D.
串联电流负反馈
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反馈参考答案：
举一反三
【单选题】---Why are you standing there, Maggie? ---I can’t see the blackboard clearly. Two tall boys are sitting _______ me.
A.
behind
B.
in front of
C.
beside
D.
next to
【单选题】Out there, in the midst of the snow, ______ in long, black clothes．
A.
a woman sat
B.
sat a woman
C.
sitting a woman was
D.
a woman was sitting
【单选题】In the reading room, we found her ______ at a desk, with her attention _______ on a book.A．sitti
A.
24. In the reading room, we found her ______ at a desk, with her attention _______ on a book. A．sitting; fixing
B.
sat; fixed
C.
seating; fixing
D.
seated; fixed
【单选题】我们不得不像林纾研究专家,为林纾平反的 _________ 先生那样感叹, “ 我们固然需要‘五四’,但也不能没有林纾!”
A.
张俊才
B.
钱钟书
C.
樽本照雄
D.
郭沫若
【单选题】听力原文： As a writer, I seem to spend most of the time working in my office at home, sitting alone in front of the computer. In fact, the only people I see regularly are the members of my family, when th...
A.
In libraries.
B.
At a college.
C.
At her home.
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