Methods for on-lineretrieval and consulting of chemical information from Internet were summarized, meanwhile some outstanding chemical web sites are listed.
简要概括了互联网上化工信息检索和查询的方法，并列举了一些优秀的化工网站。
2
This text discuss how to take on issues retrieval service in the library of hospital attached to a medical university in digital time, furnish information service new model for clinical front line.
探讨数字时代医科大学附属医院图书馆如何承担课题检索服务，为临床一线提供新型的信息服务模式。
3
There are three concepts in informationonline search:(user's)question concept, indexing concept, retrieval concept.