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Explore the updated online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of articles, biographies, videos, images, and web sites.

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biographies biology business chemistry chinese cultures dictionaries economics encyclopedias ethics histories library-lesson mandarin mathematics physics science societies technologies tourism travel 中文 倫理 傳記 化學 商業 圖書課 字典 數學 文化 旅遊 旅遊業 普通話 歷史 物理 生物 百科全書 社會

the free encyclopedia that anyone can edit.

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biographies biology business chemistry chinese cultures dictionaries economics encyclopedias ethics histories library-lesson mandarin mathematics physics science societies tourism travel wikis 中文 倫理 傳記 化學 商業 圖書課 字典 數學 文化 旅遊 旅遊業 普通話 歷史 物理 生物 百科全書 社會 科學 科技

Encyclopedia, Almanac, Atlas, Biographies, Dictionary, Thesaurus, Free online reference, research and homework help.

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biographies databases dictionaries directories encyclopedias library-lesson maps thesaurus yearbook 傳記 同義詞詞典 圖書課 地圖 字典 年鑑 百科全書 目錄 資料庫

The Tree of Life Web Project (ToL) is a collaborative effort of biologists from around the world. On more than 9000 World Wide Web pages, the project provides information about the diversity of organisms on Earth, their evolutionary history (phylogeny), and characteristics.

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animals biology earth encyclopedias evolution histories plants 動物 地球 植物 歷史 演化 生物 百科全書

Answers.com - the ultimate answer engine, with quick accurate dictionary, thesaurus, encyclopedia, bios, tech terms, news, sports, weather, and much more.

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biographies 傳記 biology 生物 business 商業 chemistry 化學 dictionaries 字典 databases 資料庫 encyclopedias 百科全書 histories 歷史 library-lesson 圖書課 mathematics 數學 physics 物理 science 科學 search-engines 搜尋引擎 societies 社會 thesaurus 同義詞詞典 tourism 旅遊業 travel 旅遊 cultures 文化

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encyclopedias philosophy 哲學 百科全書

While Wikipedia isn’t likely to lose its status as the first place people look for quick answers anytime soon, there are loads of other sites out there that can provide you with information, some of which may even be better and more accurate. Whether you’re researching for a paper or just settling a bet with a friend, here are 100 places you can find all the answers you need quickly and easily online.

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directories databases library-lesson reference-service dictionaries encyclopedias catalogue mathematics science psychology philosophy languages societies literature technologies arts histories liberal-studies 參考諮詢 哲學 圖書課 字典 心理 教學網站 tutorials