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【单选题】
关于差动放大器的描述 不正确 的是( )A.
共模抑制比较高
B.
对零点漂移的抑制作用较小
C.
电路结构具有对称性
D.
能抑制共模信号放大差模信号
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【简答题】一篇关于 Zika virus 的阅读理解 The mosquito-borne Zika virus, which has spread to 22 countries in the Americas, is terrifying to pregnant women and their partners. The virus may cause birth defects in babies w...
【简答题】A．About half of the women being studied suffered from depression. B．Babies whose mothers had been depressed were more likely to get depressed when they grew up. C．Babies whose mothers remained depress...
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