Entrez检索 000队 ·全局检索(Global Search) (http://www.ncbi.nlm.nih.gov/gquery/) 该检索方法可对检索词进行多个数据库的宽泛检索，但检索结果不精 确。精确检索须针对特定数据库，采用特殊方法进行查询。 NIH National Library of Medicine Log in Vatlonal Ceve for Biofecinology Infomton Search NCBI rohe台 Search COVID-19 resources COVID-15 news NCBI Virus LitCovid BLAST The moat up to date set of A curated ltersture hub for the Use our new Betacoronivirus SARS-CoV-2 nucleotide and latest scientific information on database for SARS-CoV-2 protein sequencen COVID 19 BLAST genome nequence analynis Literature PubMed Literature databases PubMed compcises more than 34 million citations fot biomedical literuture Bookshelf from MEDLINE.life science journals,and online books.Citations may include Pub edgov Books and ripnrt links to full text content fromn PubMod Central and publisher web sites MeSH Enterz的全局检索页面（局部） 22Entrez 检索 22 • 全局检索（Global Search）（http://www.ncbi.nlm.nih.gov/gquery/） 该检索方法可对检索词进行多个数据库的宽泛检索，但检索结果不精 确。精确检索须针对特定数据库，采用特殊方法进行查询。 Enterz 的全局检索页面（局部）