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【单选题】
如果网络结构如图,交换机所有端口属于同一个VLAN,以下哪一项描述是错误的()。A.
终端B向终端C发送IP分组时，IP分组直接封装在以MAC C为目的MAC地址的MAC帧中。
B.
终端A向终端B发送IP分组时，IP分组直接封装在以MAC R1为目的MAC地址的MAC帧中。
C.
终端A向终端D发送IP分组时，IP分组直接封装在以MAC D为目的MAC地址的MAC帧中。
D.
终端A向终端B发送IP分组时，IP分组直接封装在以MAC B为目的MAC地址的MAC帧中。
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【简答题】常见的施工组织方式有
【单选题】听力原文： When you have a dog it is necessary to care for it carefully. In return you will be loved by your dog. The most important part of dog-care is to keep the dog clean. Not only does the dog have to...
A.
As long as possible,
B.
At least 30 minutes.
C.
All day.
D.
No more than 30 minutes.
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【单选题】选出 Do you have a dog?的英式表达方法
A.
Have you got a dog?
B.
Got you have a dog?
C.
You got have a dog?
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