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Chemical Abstracts

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【摘要】 <正>Chemical Abstracts(CA),a reputable international search tool,which involves the widest disciplinary field,collects the most literature types,offers the most searching ways,and has the most prodigious volumes,is edited and published by CAS-Chemical Abstracts in the USA.CA has reported more than 10 000 kinds of technology journals,technology reports,meeting papers,academic dissertations,data chronicles,technique reports,new books,and audiovisuals,which are published by 150 countries worldwide in 56 langua-

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