单项选择题
从目前的应用需求来看,下面()不是全球多媒体网络必须具备的特性。
A.异构性
B.安全性
C.移动性
D.交互性
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单项选择题
FDDI与Token Ring的MAC帧格式较为相似,分为两种()。
A.控制帧和数据帧
B.令牌帧和信息帧
C.令牌帧和数据帧
D.控制帧和信息帧
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单项选择题
听力原文:M: Can you buy ale some stamps and envelopes while you are in the post office?W: I don't intend to stop by the post office, but I will go to the grocery store and to the cleaners after I see the doctor.Q: Where will the woman go first?(17)A.The post office.B.The grocery stove.C.The doctor's office.D.The cleaners.
A.
Q:
B.The
C.
B.The
D.
C.The
E.
D.The
F.
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