2. 外语
  3. Today, the world wide web can be used both to 【C1】______ information and to make it 【C2】______ to others. Information 【C3】_____

Today, the world wide web can be used both to 【C1】______ information and to make it 【C2】______ to others. Information 【C3】_____

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问题      Today, the world wide web can be used both to 【C1】______ information and to make it 【C2】______  to others. Information 【C3】______ on webpages is viewed 【C4】______ means of browser. The sources of information linked in this way can be located on any computer 【C5】______ is also part of the web. Each information source 【C6】______ to an indefinite number of other webpages.  Hypertext and hyperlinks allow users acting as receivers of information to 【C7】______ from one source of information to 【C8】______ , 【C9】______ for themselves which information they wish to 【C10】______ to their browser and which links they want to 【C11】______ .
     The addresses of webpages can be found by using the many hundreds of general and specialized search engines which provide 【C12】______ to databases which hold information on them. Once a webpage has been found, hyperlinks may point 【C13】______ other places of interest on the web. Addresses of webpages also 【C14】______ in other more conventional media, such as magazines, newspapers and television programs, and on posters. Webpages, in their 【C15】______ , facilitate access to information made available by other 【C16】______ of media, for example, collections held in libraries or programs broadcast on television.
     Most webpages offer interactive opportunities which go 【C17】______ merely allowing visitors freedom as to when and how they visit a page and where they might choose to go next. Feedback can be kept formal via a questionnaire which can be filled 【C18】______ , or 【C19】______ by providing an address for e-mail or even by installing a digital guest book for comments left for other users to read. Although all webpages are protected 【C20】______ unauthorized visitors cannot make unsolicited changes to them, it is also possible to limit access to pages on the Internet to those holding a password.  
【C19】
选项 A、official
B、authoritative
C、informal
D、abnormal
答案C
解析 篇章逻辑题之篇章语义。此处的informal与上文的formal构成反意关系，意思是“用户反馈除了通过填写问卷这种正式形式之外，也可以通过提供电子邮件地址或供其他用户阅读的电子留言等非正式途径实现”。
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