【摘要】:http://scholar.google.comhttp://www.isshp.com.cnhttp://www.base-search.net/http://www.vascoda.de/http://www.goole.com/http://www.a9.comhttp://www.ixquick.comhttp://vivisimo.com/ht
http://scholar.google.com
http://www.isshp.com.cn
http://www.base-search.net/
http://www.vascoda.de/
http://www.goole.com/
http://www.a9.com
http://www.ixquick.com
http://vivisimo.com/
http://www.findarticles.com/
http://www.sciseek.com/Sample
http://www.chmoogle.com
http://www.emolecules.com
http://www.ojose.com/
http://citeseer.ist.psu.edu/
http://hpsearch.uni-trier.de/
http://cnplinker.cnpeak.com/
http://guoxue.baidu.com/
http://infomine.ucr.edu/
http://www.scirus.com
http://www.findarticles.com/
http://www.alltheweb.com/
http://www.intute.ac.uk/
http://ixquick.com/
http://bt.fkee.net/
免责声明:以上内容源自网络,版权归原作者所有,如有侵犯您的原创版权请告知,我们将尽快删除相关内容。