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【单选题】
OSI参考模型中,传输的基本单位是帧的层次是( )A.
数据链路层
B.
网络层
C.
物理层
D.
传输层
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举一反三
【单选题】Speaker A:The biology seminar will begin on August 21st. Speaker B;So it has been set after all.______.
A.
I thought we need a couple of days to decide
B.
It's too long to setde it down
C.
How terrible it is to put it off
D.
August 21st is an unlucky day
【简答题】请听下面一段材料，回答第1至3题。 1. What's the probable relationship between the two speakers? [ ] A. Good friends. B. Strangers. C. Classmates. 2. What can we know about the woman from the conversation? [ ]...
【简答题】从键盘输入两个数,由大到小输出这两个数值,若两数相等输出其中一个。
【单选题】How long has the St. Louis County Library been in its current location?
A.
For three years.
B.
For less than two months.
C.
Not sure.
【简答题】请听下面一段材料，回答第1-3题。 1. What’s the probable relationship between the two speakers? A. Good friends. B. Strangers. C. Classmates. 2. What can we know about the woman from the conversation? A. She won a cu...
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