题目内容

数据流程图是根据 【18】 加以抽象而得到的。

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Questions 11 to 18 are based on the conversation you have just heard.

A. He didn’t think it a success.
B. He was listening too attentively to the speakers.
C. He was puzzled by what the speakers said.
D. He had nothing to say.

比较好的接地方式是______接地,每条屏蔽线的屏蔽层______与设备的外壳相连,另一端______。

The houses in this residential area __________ (价格在30万至50万美元之间).

通过加屏蔽的方式可以抑制来自电网的干扰。( )

A. 对
B. 错

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