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【单选题】
在共e、共c、共b、共e-b几类放大器中，无电压放大倍数的放大器是（）A.
共e
B.
共c
C.
共b
D.
共e-b
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反馈参考答案：
举一反三
【简答题】用省略的方式改写每组中第二个句子 John brought some carnations, and Catherine broughtsome sweet peas.
【判断题】P eople buy insurance through an insurance agent or broker to assist in their purchase.
A.
正确
B.
错误
【简答题】A．How primitive people used flags. B．What the ancient means of communication was. C．Why the torch towers were built. D．How the Great Wall came into being.
【简答题】A．How primitive people used flags. B．What the ancient means of communication was. C．Why the torch towers were built. D．How the Great Wall came into being.
【简答题】An insurance p______ can guarantee a person against potential loss.
【简答题】我们称挠率________ 的曲线为挠曲线。
【简答题】A．How primitive people used flags. B．What the ancient means of communication was. C．Why the torch towers were built. D．How the Great Wall came into being.
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