讲解著名搜索引擎天网的PPT！是以前的版本，大家可以学习一下！,Explain the well-known search engine Tianwang the PPT! Is the previous version, you can learn about!

搜索引擎优化基础教程。包括百度、谷歌、雅虎等搜索引擎的讲解。sitemap和robots的讲解分析。-The basis of search engine optimization tutorial. Including Baidu, Google, Yahoo and other search engines to explain. explanations of sitemap and robots.

搜索引擎的相关学习资料，供参考学习，采用PPT讲解，学习文献搜索的知识。-Search engine-related learning materials for the reference study, the use of PPT to explain, learn the knowledge of the literature search.