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【单选题】
某放大器的电压放大倍数为Au =－ 100，其负号表示（ ）。A.
衰减
B.
输出电压和输入电压 同相
C.
放大
D.
输出电压和输入电压 反相
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反馈参考答案：
举一反三
【判断题】Their agreement was too great for coincidence . It means that it is not coincidence.
A.
正确
B.
错误
【简答题】No agreement was reached in the discussion
between the two parties, ____either side refused to soften their position.A. when B. while C. unless D. even
though
【单选题】An agreement was about to be reached the other side ehanged their mind
A.
before
B.
while
C.
as
D.
when
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