在一个广播域中，IP地址和MAC地址的对应关系正确的是（）。_移动网络维护技术_全学科试题题库

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在一个广播域中，IP地址和MAC地址的对应关系正确的是（）。
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Close TestThe manager of a small building company was very (21) to get a bill for two white mice which one of his workmen had bought. He sent for the workman and asked him why he had had the bill (22) to the company."well ," the workman answered , "you remember the house we were (23) in Newbridge last week. don't you? One of the things we had to do there was to put in someNew electric wiring. Well , in one place we had to pass some wires through a pipe (24) and about an inch across ,which was built into solid stone and had four big bends (弯角) in it. (25) could think how to do this unless I had a good idea. I went to a shop and bought two white mice ,one of them male and the other female. Then I tied a thread to the body of the male mouse and put him into the pipe at one end , (26) Bill held the female mouse at theother end and pressed her gently to make her squeak. When the male mouse heard the female mouse's squeaks ， he rushed along the pipe to help her. I suppose he was a gentleman (27) he was only a mouse. Anyway , as he ran through the pipe , he (28) the thread behind him. It was then quite easy for us to tie one end of the thread to the electric wires and pull them (29) the pipe. " The manager (30) the billfor the white mice.21. A. surprised B. sorry C. strange D. fearful22. A. to be sent B. to sent C. send D. sent23. A. mending B. cleaning C. repairing D. setting24. A. thirty-feet-long B. thirty foots longC. thirty feet long D. thirty feets long25. A. None of us B. No one usC. No of us D. None us26. A. as B. so C. while D. when27. A. even though B. as thoughC. in fact D. sure enough28. A. pulled B. pushed C. lifted D. brought29. A. along B. through C. inside D. towards30. A. received B. agreed C. paid D. cashed

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