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】______ o

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

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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 by【C4】______ 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 another,【C8】______ for themselves which information they wish to【C9】______ to their browser and which links they want to【C10】______ . The addresses of webpages can be found by using the hundreds of search engines which provide【C11】______   to databases which hold information on them. Once a webpage has been found, hyperlinks may point【C12】______ other places【C13】______   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【C16】______ , facilitate access to information made available by other【C15】______ of media, for example, collections held in libraries. Most webpages offer interactive opportunities which go【C17】______  merely allowing visitors freedom as to when and how they visit a page. Feedback can be kept formal via a questionnaire which can be filled【C18】______ , or informal by providing an address for email or even by【C19】______ a digital guest book for comments left for other users to read. Although all webpages are protected so that unauthorized visitors cannot make unsolicited changes to them, it is also possible to【C20】______ access to pages on the internet to those holding a password.
【C19】
选项 A、install
B、installed
C、installing
D、installs
答案C
解析 结构衔接题。介词by后面应该用动词install的动名词形式。
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