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【判断题】
反馈到放大器输入端的信号极性和原来假设的输入端信号极性相同为正反馈,相反为负反馈()A.
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B.
错误
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反馈参考答案：
举一反三
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【简答题】In the past, man did not have to think about the protection of his environment. There were few people on the earth, and natural 36 seemed to be unlimited. Today things are 37 . The world has become to...
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