功放电路如图所示:(1)如V1和V2的ICM=200mA,PCM=200mW,U(BR)CEO=24V,晶体管的饱和压降为0.5V,电路的最大输出功率为( )。 A.0.945W B.1.89W C.0.564 W D.0.2W(2) 如晶体管的β=50,当二极管开路产生( )后果。 A. V1和V2的损坏 B. V1和V2截止 C. V1和V2的饱和 D.无影响(3) 动态时,若输出电压波形出现交越失真,应调整( )电阻。A. R3 B. R2 C. R1 、 D. RL【图片】
【简答题】Read the essay Wuhan Coronavirus comprensively and pick out ten key words and make a sentence with each word. Summarize the essay and comment on it afterwards with about 250 words.