参考网站目录　/　此网站目录下共收录216个优秀网站

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  Udacity

  Provides free online courses along with a range of certification options for a fee.

  http://Udacity.com/
  百度权重：
  PageRank：
  AlexaRank：0
  收录时间：2026-01-10
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  Lumosity

  Web-based application that uses games to improve cognitive abilities. Provides information about memory, brain health and cognition.

  http://Lumosity.com/
  百度权重：
  PageRank：
  AlexaRank：0
  收录时间：2025-12-20
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  Worldcat

  Global catalog finds more than one billion items and growing, online articles and files as well as books and media in libraries near the searcher's computer location.

  http://Worldcat.org/
  百度权重：
  PageRank：
  AlexaRank：0
  收录时间：2025-12-24
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  Upenn

  Official web site.

  http://Upenn.edu/
  百度权重：
  PageRank：
  AlexaRank：0
  收录时间：2026-01-04
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  Ucdavis

  The official site of UC Davis.

  http://Ucdavis.edu/
  百度权重：
  PageRank：
  AlexaRank：0
  收录时间：2026-01-06
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  Collegeboard

  Register online, prepare with real SAT questions, and get instant confirmation of test date and location.

  http://Collegeboard.org/
  百度权重：
  PageRank：
  AlexaRank：0
  收录时间：2026-01-02
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  Nyu

  Founded in 1831 to enlarge the scope of higher education: includes thirteen schools, colleges, and divisions at five major centers in Manhattan.

  http://Nyu.edu/
  百度权重：
  PageRank：
  AlexaRank：0
  收录时间：2026-01-06
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  Oxforddictionaries

  Dictionary by Oxford University Press. Answers questions on English grammar, spelling, and usage. Basic dictionary is free, premium content with subscription.

  http://Oxforddictionaries.com/
  百度权重：
  PageRank：
  AlexaRank：0
  收录时间：2026-01-14
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  Illinois

  General information about the departments and contacts.

  http://Illinois.edu/
  百度权重：
  PageRank：
  AlexaRank：0
  收录时间：2026-01-02
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  Turnitin

  Provides a service to determine the originality of texts based on comparisons with their internal database and net-wide searches. Five free trials.

  http://Turnitin.com/
  百度权重：
  PageRank：
  AlexaRank：0
  收录时间：2025-12-26