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反相比例运算电路可实现Au<0的放大器（)反相比例运算电路可实现Au<0的放大器（)
反相比例运算电路可实现Au<0的放大器 ()

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硅稳压管稳压电路的输出电流任意变化，稳压管都能起到很好的稳压作用()

二极管作理想模型时，认为二极管导通时正向电压为零()

oking for pen-friends and you want to get in touch with her.
Name: Andy Lewis Age :21
Interest: collecting coins, stamps and postcards, learning foreign languages.
All letters will be answered.
Address .20 Staten Street, Eylandt, DF8 3LF,USA
Write a letter to her (Andy Lewis), telling her about:
1) your family
2) your schooling or work
3) your hobbies
You should write approximately 100 words. Do not sign your own name at the end of your letter. Use "Li Ping" instead. You needn' t write the address.

在放大电路中，通过合理地引入交流负反馈，可使电路的增益得到稳定。()