皮皮学，免费搜题
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搜题
【单选题】
主频为12MHz的单片机它的机器周期为()A.
1/12 μs
B.
1/6 μs
C.
1 μs
D.
2 μs
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举一反三
【单选题】What will the man do this afternoon?
A.
He has an important meeting.
B.
He has a lunch appointment.
C.
He will check his schedule for openings.
D.
He will write a report.
【单选题】What does the woman tell the man?
A.
He has to do what is necessary in order to learn.
B.
He doesn't have to memorize all the vocabulary.
C.
There is not much he can learn by memorizing.
【简答题】A．No, he is not allowed to change his mind. B．Yes, he has the legal right to do so. C．No, because he has already displayed the goods. D．Yes, if the customer allows him to do so.
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