要求输入电阻大于10MΩ，电压放大倍数大于300，第一级应采用( )，第二级应采用共射电路。_电气工程及其自动化_全学科试题题库

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要求输入电阻大于10MΩ，电压放大倍数大于300，第一级应采用( )，第二级应采用共射电路。
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