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【判断题】
放大电路中的负反馈，对于在反馈环中产生的干扰、噪声和失真有抑制作用，但对输入信号中含有的干扰信号等没有抑制能力。A.
正确
B.
错误
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A.
The first sentence.
B.
The second sentence.
C.
The first and second sentences.
D.
The last sentence.
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