document.write("<a href='show/?");document.write("19.html");document.write("'>上一篇：");document.write("工程设计资质证书专项乙级");document.write("</a>");document.write("<br />");document.write("<a href='show/?");document.write("16.html");document.write("'>下一篇：");document.write("环境管理体系认证证书");document.write("</a>");