搜索引擎概述 语句搜索(Sentence Search):指输入一个 多词的任意语句，提交搜索引擎查询，这种方 式也叫任意查询。不同搜索引擎对语句中词与 词之间的关系的处理方式不同 。目录搜索(Catalog Search):指按搜索引擎 提供的分类目录逐级查询，用户一般不需要输 入查询词，而是按照查询系统所给的几种分类 项目，选择类别进行搜索，也叫分类搜索 (Classified Search)
搜索引擎概述 l 语句搜索(Sentence Search)：指输入一个 多词的任意语句，提交搜索引擎查询，这种方 式也叫任意查询。不同搜索引擎对语句中词与 词之间的关系的处理方式不同 l 目录搜索(Catalog Search)：指按搜索引擎 提供的分类目录逐级查询，用户一般不需要输 入查询词，而是按照查询系统所给的几种分类 项目，选择类别进行搜索，也叫分类搜索 (Classified Search)
搜索引擎概述 高级搜索(Advanced Search):指用布尔逻 辑组配方式查询 。检索方法 。目录检索(Catalog Search) o http://dir.yahoo.com/ 。可浏览式的分类主题目录 o专家参与建立 。主题分类精确，范围广泛 。查准率高
搜索引擎概述 l 高级搜索(Advanced Search)：指用布尔逻 辑组配方式查询 ¡ 检索方法 l 目录检索（Catalog Search） ¡ http://dir.yahoo.com/ ¡ 可浏览式的分类主题目录 ¡ 专家参与建立 ¡ 主题分类精确，范围广泛 ¡ 查准率高
Yahool Help YAHOO。!DIRECTORY Search:○the Web⊙the Directory Search Yahoo!Directory Advanced Search Suggest a Site Email This Page Ads by Yahoo! Arts Humanities The Spark:Paraskevidekatriaphobia(Fear of Friday the 13th) Clown Make Up,Noses. Photocraphy,History,Literature... By Daye Sikula Socks,Balloons Business Economy Fri,November 13,2009,12:01 am PST Mehron,Kryolan,Paradise. B28.Finance,Shopping,Jobs... Today is Friday the 13th,which is supposed to be an unlucky day. Grease or water based Computers Internet Why this is,no one is exactly sure.There are plenty of theories, makeup. ranging from the numerological to the religious to the historical,but www.tryers.com Hardware,Software,Web,Games.. nothing concrete.For some folks,it's just another day,but for Education others,it's something to be taken seriously while being reminded of Looking for Herpa Wings Colleges,K-12,Distance Learning.. our phobias. airplane Models? We have over 2000 die-cast Entertainment With that in mind,we polled some of our fellow Yahools to find out model airplanes at the Movies,TV Shows,Music,Humor... what they were afraid of,and what they do to ward off bad luck.In lowest prices. Government fact,there turned out to be so many fears and cures that we had to www.AirlineMuseum.com Elections,Military,Law,Taxes... break it all up into three parts. Be Specialized in Razor Health Not surprisingly,some of our colleagues suffer from coulrophobia Barbed Wire Diseases,Drugs,Fitness,Nutrition... or an unnatural fear of clowns: Seriously.does this kitty look Huahong Mesh Industry like bad lud? News Media Corporation Ltd.---Tell:486- (Photo by Adhi Rachdian) Sarah:I'm afraid of clowns and roller coasters,which is interesting. 13903287552, Newspapers,Radio,Weather,Blogs... considering I worked at an amusement park for two years in college. www.huahongwiremesh.co... Recreation Sports Sports,Trave包，Autos,utdoors Mike:People with a lot of makeup on make me ill--literally.Like,I can't eat around clowns and Pick Roller Parts Supplier Reference stuff.I'll totally hurl.(Editor's note:That might inspire emetophobia in some other folks.) Dp Technologies supplies Pick Rollers for Banking Phone Numbers,Dictionaries,Quotes... Mahlon suffers from xyrophobia:Razor blades,especially straight razors or double-sided razors, Equipment Item... Regional creep me out!Whenever I see them,I feel especially vulnerable around the throat and inner arms. www.dptechinc.net Countries,Reqions,U.S.States.. Eek!And gum chewing--not a phobia exactly,but I will cross the street or leave the room to Amusement Sunnlies for
OWeb Directory I OCategory Love the DIRECTORY? Search Add it to Search! GOI Computers and Internet Emaill this page Suggest a site Advanced Search Directory Computers and Intemet CATEGORIES OWats This Commercial Categories Business to Business@ Consumer Products and Services@ Additional Categories Chats and Forums@ Issues (11) Communications and Networking (1370)NEw! 。Macintosh(425) Computer Generated Art@ Magazines@ Computer Generated Music@ Mobile Computing (60) Computer Science@ Multimedia (513) Computers and Technology Blogs@ News and Media(492) Contests(17) Operating Systems@ Conventions and Trade Shows@ Organizations 72) Countries.Cultures.and Groups (38) People(161) Cyberculture@ Personal Digital Assistants (PDAs)(437) Data Formats (474) Product Information and Reviews(136)
常用搜索引擎-Google o Google-功能强大，易用性最强，搜索速度快 检索网页数量达30亿，搜索引擎中排名第一；支持多 达132种语言； 网站只提供搜索引擎功能且查询速度极快 专利网页级别技术“PageRank”提供准确率极高的搜 索结果； 智能化的“手气不错”功能，提供可能最符合要求的 网站 “网页快照”功能，能从Google服务器里直接取出缓 存的网页。 独到的图片搜索功能和强大的新闻组搜索功能；具有 二进制文件搜索功能
常用搜索引擎-Google ¡ Google-功能强大，易用性最强，搜索速度快 l 检索网页数量达30亿，搜索引擎中排名第一； 支持多 达132种语言; l 网站只提供搜索引擎功能且查询速度极快 l 专利网页级别技术“PageRank”提供准确率极高的搜 索结果； l 智能化的“手气不错”功能，提供可能最符合要求的 网站 l “网页快照”功能，能从Google服务器里直接取出缓 存的网页。 l 独到的图片搜索功能和强大的新闻组搜索功能； 具有 二进制文件搜索功能