有关反射弧的错误的表述是（ ）

A、people’s auditory perception is always selective
B、people’s short-term memory lasts for no more than two hours
C、some audience have difficulty in adapting to the speaker’s presentation style
D、listeners are often egocentric
E、the speaker fails to express ideas fluently and clearly

A、提高放大电路的输入电阻
B、向负载高效率供给大功率信号
C、提高放大电路的增益
D、提高放大电路的输出电阻