题目内容

Bluetooth can be used to link devices in a ().

A. WAN
B. MAN
C. LAN
D. PAN

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The speed of a computer network connection is usually rated in ().

A. Hz
B. Mbps
C. KB
D. GB

Which of the following are the topology of network?

A. star
B. relation
C. tree
D. mesh

请思考一下：3500/1000*1000,结果是_______

美国新经济的主要特征是以（）为基础。

A. 技术
B. 知识
C. 人才
D. 生产