This paper introduce how to retrieve Web information by search engine from five aspects of search engine, working mechanism, standards evaluation, classification, methods and skills.
从搜索引擎的工作机理，评价标准，分类，使用方法，使用技巧等五个方面介绍如何利用搜索引擎检索网络信息。
The thesis is composed by five parts, which are research on the background, basic theory, classification and evaluation of resources, analysis of exploiting models and Suggestions.
本文共分五大部分，即背景研究、基础理论、资源分类评价、开发模式分析以及对策建议。
Objective To evaluate the clinical application of detection of five-classification by SF-3000 blood-counter system.
目的评价SF - 3000血细胞计数仪五分类检测的临床应用。
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