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【判断题】
HDLC定义了三种帧，分别是信息帧(I帧)、监控帧(S帧)和无编号帧(U帧)。()A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】--- Hey , I’ve been looking for you. --- ________ --- I was thinking about having a picnic at the People’s Park this Sunday. Would you like to come?
A.
Guess what?
B.
What’s up?
C.
That’s it?
D.
Sure thing!
【单选题】I’m afraid I’m a poor speaker ,however, I’m() fully()this,so I’ve been studying how to speak in public.
A.
known about
B.
aware of
C.
think of
D.
thinking about
【单选题】Dear Nicky, Thanks for your letter. It was lovely to hear from you. I’ve been thinking about your question about what I find strangest about living in China --- but the trouble is I’ve been here so lo...
A.
honeymoon phase
B.
negotiation phase
C.
adjustment phase
D.
culture acceptance
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