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academic article：口罩的防护力研究
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apps for two factor authenticator(2fa)
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book series: 30-second
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book series: for beginners
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book series: Introducing
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book: Automate the Boring Stuff with Python
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book: Discovering Statistics Using R
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book: python编程快速上手——让繁琐工作自动化
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book: 科普领域的质性分析: MAXQDA软件应用
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citation analysis and bibliometrics
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CiteScore期刊排名：Tourism, Leisure and Hospitality Management
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data: 全球桌面浏览器市场份额月度数据desktop-browser-www-monthly
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datasets online
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Digital tools for researchers
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error message in R: Error in .Call.graphics(C_palette2, .Call(C_palette2, NULL))
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Google Scholar排名前20的旅游、接待期刊
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head first（深入浅出）书系
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List: online office
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List: 学术数据库期刊分类：旅游、接待、休闲、运动、服务
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List: 旅游、休闲、运动、接待领域的SSCI期刊
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