求英文文献2篇 有链接的哦02

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1.
[size=0.91666em]Prev Med. 2011 Sep 12. [Epub ahead of print]

Screen time, physical activity and mental health among urban adolescents in China.
Cao H, Qian Q, Weng T, Yuan C, Sun Y, Wang H, Tao F.


http://www.sciencedirect.com/science?_ob=ShoppingCartURL&_method=add&_eid=1-s2.0-S009174351100363X&_acct=C000228598&_version=1&_userid=10&_ts=1317009194&md5=c91ca6051b9aaf9744ace943afe964c8


2.
[size=0.91666em]Aging Ment Health. 2010 Jan;14(1):108-12.

Correlation between loneliness and social relationship among empty nest elderly in Anhui rural area, China
Wu ZQ, Sun L, Sun YH, Zhang XJ, Tao FB, Cui GH.


http://www.tandfonline.com/doi/pdf/10.1080/13607860903228796

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关键词：求英文文献 英文文献 relationship correlation sciencedire 英文文献

第二篇

第一篇
http://good.gd/1630891.htm