收录时间PageRankBaiduRankSogouRankAlexaRank点入次数点出次数人气指数北美洲网站大全

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  The White House美国白宫

  The White House www.whitehouse.gov美国白宫

  点击进入 - 2014-02-04 - 收藏
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  Library of Congress

  The Library of Congress. The Library of Congress is the nation\'s oldest federal cultural institution, and it serves as the research arm of Congress. It is also the largest library in the world, with more than 120 million items. The collections include books, sound recordings, motion pictures, photographs, maps, and manuscripts

  点击进入 - 2015-03-20 - 收藏
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  Welcome to the USGS - U.S. Geological Survey

  Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment.

  点击进入 - 2014-02-04 - 收藏
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  奥巴马医保网站

  Health Insurance Marketplace, Affordable Care Act | HealthCare.gov奥巴马医保网站www.healthcare.gov Learn how the health care law affects you at Healthcare.gov. The official site of the Health Insurance Marketplace. See your health insurance choices.

  点击进入 - 2013-10-28 - 收藏
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  MetroLyrics

  MetroLyrics is a searchable lyrics database featuring 1,000,000+ song lyrics from 20,000 artists. Use MetroLyrics to find your forite song lyrics.

  点击进入 - 2014-11-28 - 收藏
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  TechCrunch科技

  TechCrunch is a leading technology media property, dedicated to obsessively profiling startups, reviewing new Internet products, and breaking tech news.

  点击进入 - 2013-11-17 - 收藏
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  Department of Energy美国能源部

  Department of Energy www.energy.gov美国能源部

  点击进入 - 2014-02-04 - 收藏
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  GitHub

  GitHub · Build software better, together github.com GitHub is the best place to build software together. Over 4 million people use GitHub to share code

  点击进入 - 2014-06-12 - 收藏
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  U.S. Department of Education

  U.S. Department of Education www.ed.gov

  点击进入 - 2014-02-04 - 收藏
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  Woot

  Woot

  点击进入 - 2014-02-04 - 收藏
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  Pinterest图片分享网

  Pinterest是全球最大的图片社交分享网站。Pinterest采用的是瀑布流的形式展现图片内容，无需用户翻页，新的图片不断自动加载在页面底端，让用户不断的发现新的图片。...

  点击进入 - 2013-11-17 - 收藏
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  Grooveshark官网

  Grooveshark（鲨客）是一个在线音乐分享与搜索平台，提供免费在线收听音乐服务，用户可以输入关键字进行相关歌曲搜索，如：歌手、歌曲名称、音乐类型等，大部分歌曲都可以畅听无阻。ScoreBig has joined forces with Grooveshark to help its listeners hear their forite artists live. Pay less and get better concert tickets with no fees at ScoreBig

  点击进入 - 2015-12-02 - 收藏
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  Central Intelligence Agency

  Welcome to the CIA Web Site — Central Intelligence Agency www.cia.gov

  点击进入 - 2014-02-04 - 收藏
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  美国国防部官网

  United States Department of Defense (defense.gov)www.defense.gov美国国防部官网

  点击进入 - 2014-02-04 - 收藏
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  Khan Academy

  Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.

  点击进入 - 2014-05-22 - 收藏