在下图所示电路中,已知U CC =U EE =12V,β 1 =β 2 =β=50,r be =6.92kΩ,R C =30kΩ,R B =10kΩ,R E =27kΩ,R W =500Ω,R W 的滑动端处于中点位置,R L =20kΩ,试估算放大器的静态工作点、差模电压放大倍数、差模输入电阻及输出电阻。
【简答题】The immune system ( 免疫系统 ), which protects the body from infections, diseases, and other injuries, is composed of the lymphatic system ( 淋巴系统 ) and the skin. Lymph nodes ( 淋巴结 ), which measure about 1...