if(document.getElementById('relative'))document.getElementById('relative').innerHTML='<div>前一篇：<a href=\"/other/chem_knowledge/show.asp?id=606010\" target=\"_self\">几种调合汽油的特性和化学组成</a></div>\n<div>后一篇：<a href=\"/other/chem_knowledge/show.asp?id=607627\" target=\"_self\">关于柴油的分类和相关标准仪器</a></div>\n';