多项选择题
A.FileB.ClipboardC.CollectionsD.E-mailE.My Bibliography
A.Best MatchB.Publication DateC.First AuthorD.Last AuthorE.Journal
A.SummaryB.AbstractC.MEDLINED.XMLE.PMID List
A.MeSH转换表B.刊名转换表C.短语表D.著者索引E.团体索引
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