if(document.getElementById('relative'))document.getElementById('relative').innerHTML='<div>前一篇：<a href=\"/other/chem_knowledge/show.asp?id=612718\" target=\"_self\">石油百科：什么是油气集输</a></div>\n<div>后一篇：<a href=\"/other/chem_knowledge/show.asp?id=617614\" target=\"_self\">车用汽油辛烷值测定法</a></div>\n';