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What's the type of the following paragraphs?1. In this summer holiday, I got a part-time job as a teacher. This was the first time I taught students. It was full of trouble, but I really enjoyed. I will never forget the experience.

A. narrative
B. argumentative
C. expository

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What's the type of the paragraph?Nowadays, with the development of technology, many modern forms of communications, such as phone calls and email, have stepped into our life. Facing with these, the traditional way of communications---face-to-face communication seems to be left behind the times. But in fact, this is not true. For me, nothing can parallel with face-to-face communication. The following are my reasons.

A. narrative
B. argumentative
C. expository

What's the type of the paragraph?Nowadays radio and TV play more and more important roles in our daily life. There are many programs shown every day. Some of them are very good. My favourite TV program is called "Animal World", which is broadcasted by CCTV.The program provides us with natural scenes, the life of many kinds of wild animals and the wonderful explanation about their life.

A. narrative
B. argumentative
C. expository

反馈信号使净输入信号减弱,这种反馈称为()。

A. 正反馈
B. 负反馈
C. 交流反馈
D. 直流反馈

运算放大器工作在线性区的分析方法有虚短和()。

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