题目内容

6[音频]

A. It's not bad.
B. Well, I prefer Nokia.
C. I'm going to buy a cell phone.
D. It's true they are famous.

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7[音频]

A. Well, I'd prefer to call later.
B. You'd better not.
C. Thank you all the same.
D. That's all right.

8[音频]

A. No, thank you.
B. Yes, go ahead.
C. I'm not sure.
D. Yes, I think so.

欲将方波电压转换成三角波电压,应选用

A. 积分运算电路
B. 微分运算电路
C. 差分反比例运算电路
D. 同相比例运算电路

欲将方波电压转换成尖顶波电压,应选用

A. 积分运算电路
B. 微分运算电路
C. 加法运算电路
D. 同相比例运算电路

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