题目内容

Short conversation 3[音频]

A. The man is tired of driving cars to work every day.
B. The man is planning to buy an intelligent car.
C. The man thinks intelligent cars might be expensive.
D. The man is working with some engineers on intelligent cars.

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Short conversation 4[音频]

A business idea brought forth by an airline.
B. How to share online profiles to look for a potential relationship.
C. A dating progam which helps people look for a partner online.
D. The in-flight online service offered by an airline.

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Short conversation 5[音频]

A. She suggests the man shoot video for people online.
B. She suggests the man quit the online business.
C. She suggests the man start a video store online.
D. She suggests the man edit videos for people online.

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正弦波自激振荡器振荡建立过程，晶体管的工作状态是（）

A. 甲类
B. 甲乙类
C. 丙类
D. 甲类－>甲乙类－>丙类

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正弦波振荡器是不需要输入信号控制就能自动地将直流能量转换为特定频率和振幅的正弦交变能量的电路

A. 对
B. 错

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Short conversation 3[音频]

A. The man is tired of driving cars to work every day. B. The man is planning to buy an intelligent car. C. The man thinks intelligent cars might be expensive. D. The man is working with some engineers on intelligent cars.

Short conversation 4[音频]

Short conversation 5[音频]

正弦波自激振荡器振荡建立过程，晶体管的工作状态是（）

正弦波振荡器是不需要输入信号控制就能自动地将直流能量转换为特定频率和振幅的正弦交变能量的电路

A. The man is tired of driving cars to work every day.
B. The man is planning to buy an intelligent car.
C. The man thinks intelligent cars might be expensive.
D. The man is working with some engineers on intelligent cars.