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我竟然才知道!写essay和research paper必用的17个网站-搜狐

Research Fellow《China Safety Science Journal(CSSJ)》Zhong Maohua, et al. ...China Occupational Safety and Health Association, China, 2007, 17(8),pp...

Cardiovascular Research: 17 (1)_百度学术

doi:10.3969/j.issn.1008-7222.2002.04.003课题组ResearchGroup《北京市经济管理干部学院学报》...

Research Committee on Minimum Standards of ..._百度学术

2015年1月26日 - 我竟然才知道!写essay和researchpaper必用的17个网站2015-01-26智课网1、http://scholar.google.com/虽然还是

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