A man should not be judged always()what he says.
A.by
B.in
C.with
D.to
参考答案:A
________ woman with sunglasses is _______ English teacher in New Star High School.
A.The, a
B.A, a
C.The, an
D.A, an
在典型的差动式直流放大器中,RE的作用是()。
A.对差模信号构成负反馈以提高放大器的稳定性
B.对共模信号构成负反馈以提高抑制零点漂移的能力
C.使放大器放大倍数增加
D.A和B