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交换技术是在多道环境下用于【】的方法之一。

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目前常用的网络连接器主要有中继器、网桥、【】和网关组成。

How to Read Newspapers
The headline of a newspaper presents the heart of the news in brief form. Because of space limitations headline writers tend to use short verbs and nouns. Scanning the headlines gives a hasty look at the major news of the day. Headlines are often presented in steps. Each Section adds to the news presented in the top headline. If you have only a little time, you may wish to read the headlines and follow up only a few stories you are particularly interested in.
The first paragraph or lead of a news story answers certain questions that might be asked by a reader. A lead answers some or all of these questions: "Who？ What？ When'？ Where？ Why？ How？" Once again, if you are pressed for time, you can get a great deal of information by reading just the lead.
The news article develops the information presented in the headline and the lead. Since news columns must fit the space provided, putting the most important information at the beginning makes sense. You will not, of course, read every news item every day.
How to Read Newspapers
1) (46) help you to get the major news of the day.
2) If you haven't enough time, you are advised to read the headlines and follow up only (47) that you are interested in.
3) Once again, if you are pressed for time, you can get a lot of information by (48)
4) You must bear it in mind that the (49) is always put at the beginning of news column.
5) It is impossible that you can read (50) every day.

利用IIS建立的Web站的4级访问控制为IP地址限制、用户验证、【】权限和NTFS权限。

单位组织网上投票，由于技术原因，造成网络拥堵，群众反映存在暗箱操作，你怎么办？