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【简答题】
共同海损和单独海损的区别有哪些
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反馈参考答案：
举一反三
【简答题】共集组态放大器又称电压跟随器,其特点是:电压增益近似为 、输入电阻 、输出电阻 。
【简答题】I like to 1) . I like to be very active. I like to do a lot of sport. I also like to see a lot of friends. I like to go to 2) . I like to go and see plays. 2. I have two 3) so I don't have much free t...
【简答题】三级管常用放大电路有共射电路、共基电路、共集电路。其集放大电路,比如我们常说的射极电压跟随器的特点是: 电压放大倍数() 、 输入阻抗() 、 输出阻抗() 。
【单选题】听力原文：W: I enjoy going through second-hand bookstores, don't you? It's interesting to see what people used to enjoy reading. Did you see this old book of children's stories? M: Some of these books aren...
A.
In a library.
B.
In a school.
C.
In a bookstore.
D.
In a publishers' office.
【单选题】在射极跟随器中，已知RE=3kΩ，在保持输入信号不变的情况下，接上负载RL=3kΩ后，交流等效负载阻抗减小为1.5KΩ，而输出电压仍近似不变。其主要原因是（）
A.
工作点改变
B.
输出电阻减小
C.
输入电阻减小
【多选题】关于电压跟随器,下列说法正确的是( )。
A.
电路引入电压串联负反馈。
B.
电压反馈系数为1。
C.
其输入和输出极性相同。
D.
电压跟随器比射极输出器跟随特性差。
【简答题】Dear Andy I’m in London now. It’s the c 86 of England. I enjoy everything here except the food. I dislike English food. I miss dumplings and noodles. Of course I never s 87 missing you. Things here ...
【简答题】video leisure activity age group leisure time s pectator s port Gol f is my favorite _____ _____ I enjoy playing it in my free time .
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