题目内容

Which one didn't the British taxi driver do?

A. The driver gave us a friendly smile as greeted us with a "hallo".
B. He opened the back door for us to step into the back of his spacious taxi.
C. The driver talked with us on the way to the hotel.
D. At the hotel, the driver walked our luaggage to the front door.

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According to the author, which word can not be used to describe the British driver?

A. Friendly
B. They were like old friends.
C. professional 专业的
D. rude (粗鲁的) and careless (漠不关心的)

以下哪种协议是工作在5.8GHz频段?

A. IEEE802.11a
B. IEEE802.11b
C. IEEE802.11g
D. 以上都不是

无线局域网的工作频段有?

A. 0.9GHz
B. 2.4GHz
C. 3.6GHz
D. 5.8GHz

IEEE802.11MAC层报文类型包括哪几个帧?A、 B、 C、 D、

A. 数据帧
B. 控制帧
C. 数字帧
D. 管理帧

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