*Altavista: Main Page -Netscape 口 File Edit View Go Communi cator Help 当温 Back Forward Reload Home Guide Print Security Stop EbookMarksocation:http:/www.altavista.digital.com/ 是 nstant Message回 Internet Lookup New&co foot Earth's alTaVIsTA Stars! Biggest Pamela Ar Bookstore A DIGITAL Internet Service Pole and, cA-USA BDemiMool amazon com 網上娛圈 上 sFre supect (Business Search/People Search Browse by Su Search the Web for documents inany language keyword: genetic engineering Enter a few search terms and click on the search butt目」 图3.8用AltaⅤista在关键词字段查“遗传工程
图3.8 用AltaVista在关键词字段查“遗传工程
点击 Search查询后反馈结果见图3.9 3* Altavista: Simple Query keyword:"genetic engineering"-Netscape File Edit View Go Communi cator Help 程口湿 Back Forward Reload Home Search Guide Print Security Stop 日0 marks 4. cation:[wwod%3A+%22net+ ngineering'%285eah矩37&each≠7 是 Instant Message回 Internet C Lookup New&cool Help. Preferences. New Search. Advanced Search About 152175 documents match your query Click to find related books at amazon. com 1. No Title To Keywords. University of Connecticut Health Center. Keyword/Faculty. Genetic Engineering. Rajan, T.v. Updated 5/95 ahttpcortex.uchc.edu/-coopreskfgenengPtml-size474bytes-24-May-95 English- Translate 2. Bioaerosols NRC Research Associateship Programs. U.S. Environmental Protection Agency Bioaerosols RO# 22.51.05.13 CITY Corvallis STATE OR 97333 ADVISER: a Rttp rap nas.edulabEPA22520513.2tmmi-size 3K-24-Dec-97-Englisha Translate 3. Metabolic Engineering of pentose- Fermenting yeasts ocument: Done 图39用AltaⅤista在关键词字段查“遗传工程”反馈结果
• 点击Search查询后反馈结果见图3.9 图3.9 用AltaVista在关键词字段查“遗传工程”反馈结果
果 °“ genetic engineering的文章。其中第一项如下: 共找到152175个页面关健词中含有 1.No Title To Keywords. University of Connecticut Health Center. Keyword/Faculty Genetic Engineering. Rajan, T.V. Updated 5/95 httpcortexuchc.educoopres/kfgeneng.html size 474 by bytes -24 May-- Translate 有下划线的项为可链接项
• 果 • 一共找到152175个页面关健词中含有 “genetic engineering”的文章。其中第一项如下： • 1.No Title • To Keywords. University of Connecticut Health Center. Keyword/Faculty. • Genetic Engineering. Rajan, T.V.Updated 5/95. • http://cortex.uchc.edu/~coopres/kfgeneng.html - size 474 by bytes -24- • May -95- English - Translate • 有下划线的项目为可链接项
3)任意查询 特别地,可以输入任意词査询,例 如可以提出“如何开飞机”( How to drive an aeroplane?)之类的问题,见图 3.10。 Alta vista约定任意搜索时各词之间 的逻辑关系为OR
• 3)任意查询 • 特别地，可以输入任意词查询，例 如可以提出“如何开飞机” (How to drive an aeroplane?)之类的问题，见图 3.10。AltaVista约定任意搜索时各词之间 的逻辑关系为OR