SD:验证地址：http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6TX4-4F4H9TY-5-1&_cdi=5580&_user=1089764&_orig=search&_coverDate=05%2F15%2F2005&_sk=999089998&view=c&wchp=dGLbVlb-zSkWA&md5=7041163d5dc1cf37a960ae1d214582cd&ie=/sdarticle.pdf
特征字串：%PDF-
sciencemag:（精确）验证地址：http://www.sciencemag.org/cgi/reprint/293/5535/1599?maxtoshow=&HITS=10&hits=10&RESULTFORMAT=&titleabstract=Visible-light+photocatalysis&searchid=1114417483888_1092&stored_search=&FIRSTINDEX=0&fdate=10/1/2000&tdate=4/30/2005
特征字串：Download to Citation
sci验证地址： http://isi01.isiknowledge.com/portal.cgi/
验证字串： Notice (阴性验证，不匹配为free)
验证地址：http://pubs.acs.org/emeta/AcsLogin?url=%2Fcgi-bin%2Farticle.cgi%2Fchreay%2F2004%2F104%2Fi09%2Fpdf%2Fcr0304469.pdf&mode=login
验证字串：%PDF
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