题目内容

典型的长尾式差分放大电路（射极接电阻或电流源）中，射极电阻或电流源的主要作用是________。

A. 提高共模抑制比
B. 提高共模电压增益
C. 提高输入电阻
D. 提高差模电压增益

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差分式放大电路与单管放大电路相比，增加了大约一倍的元器件，但获得了抑制零点漂移的能力。

A. 对
B. 错

Rewrite the sentences with “not only ... but also..." after the model.MODEL：The room is clean; besides, it is bright.→ The room isnot onlycleanbut alsobright.1. Many people carry both credit cards and cash.

George likes French food as well as Chinese food

I saw the accident, and I told the traffic police what I had seen.