单选题 下列对差动放大器说法是错误的是() 。

A、 凡双端输出,电压放大倍数与单管放大器相同
B、 凡单端输出,电压放大倍数是双端输出的- - 半
C、 双端输出的抑制零漂能力比单端输出的要强
D、 KCMK越小,其零漂越小
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