题目内容

蓝牙耳机是WPAN的一个典型应用。( )

A. 对
B. 错

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Look at the questions from the passage and decide what the writer’s inner voice is.1. Was it really necessary to go to Provence?2. In his imagination, wasn’t he already there?3. Wouldn’t it be simpler, safer just to stay here at home in London?4. Perhaps it was just a nuisance to travel abroad at all?

某移位寄存器的时钟脉冲频率为100KHZ，欲将存放在该寄存器中的数左移8位，完成该操作需要时间。

A. 10μs
B. 80μs
C. 100μs
D. 800ms

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职业防护（occupational protection）