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【单选题】
在计算机网络体系结构中，要采用分层结构的理由是A.
可以简化计算机网络的实现
B.
各层功能相对独立，各层因技术进步而做的改动不会影响到其他层，从而保持体 系结构的稳定性
C.
比模块结构好
D.
只允许每层和其上、下相邻层发生联系
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举一反三
【判断题】The thing the author likes about the Internet is that he is able to communicate with people all over the world.
A.
正确
B.
错误
【简答题】What is the thing the author complains about? There is something wrong with ? .
【单选题】What is the thing that the author uses to describe grammar?
A.
the road map
B.
an excellent car
C.
tree and flowers
【单选题】What is the thing the author loved most about Bill? Is the thing just a tremendous excitement?
A.
Bill's entrepreneurial spirit.
B.
Bill's tremendous excitement.
C.
Bill's love.
D.
Bill's enthusiasm.
【判断题】To the author, the best thing that shows how a man is full of contradictions is the matter of sleep.()
A.
正确
B.
错误
【单选题】What is the thing that the author uses to describe vocabulary?
A.
the road map
B.
a well-conditioned car
C.
tree and flowers
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