问题
单项选择题
交流放大电路的输出端接有负载电阻R1时,在相同的输入电压作用下,输出电压的幅值比不接负载电阻R1时将()
A、减小;
B、增大;
C、不变;
D、不定。
答案
参考答案:A
交流放大电路的输出端接有负载电阻R1时,在相同的输入电压作用下,输出电压的幅值比不接负载电阻R1时将()
A、减小;
B、增大;
C、不变;
D、不定。
参考答案:A
综合填空题。 | |
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My name is Tom. I come 1._____England. I'm 2._____old. I have big blue eyes and blond hair. I'm tall. 3._____shirt is white and my pants 4._____ black. Now I'm in 5._____Seven, Grade Six. Look! That boy 6._____ a yellow coat is my friend, Bill.He's from the U.S.A. He's twelve. He is strong. We are in 7._____same school, but we are in 8._____classes. Bill gives his photo to me. I give my photo to him, 9._____. We are good 10._____ . |