已知某负反馈放大电路的反馈深度为10，开环时的上、下限截止频率分别为100kHz和100Hz，该放大电路闭环时的通频带等于___。
A. 9.99kHz
B. 99.99kHz
C. 999kHz
D. 999.99kHz
查看答案
串联负反馈不适用于信号源为理想电流源的情况。
A. 对
B. 错
[音频]News Report One
A. He is a football player.
B. He is a tennis player.
C. He is a basketball player.
D. He is a swimming athlete.
News Report One[音频]
A. He helped Great Britain win the champion after nearly eight years.
B. He helped Great Britain win a worldwide reputation.
C. He helped Great Britain win the champion of Davis Cup.
D. He helped Great Britain win the World Cup.
News Report Two[音频]
A. The first lady of Venezuela.
B. A drug trafficker.
C. An undercover US agent.
D. A movie star.
微信支付 
支付宝支付