document.write("·<a href='article/");document.write("201708");document.write("/");document.write("471");document.write(".html'>上一条：");document.write("有关PE胶袋的知识点：PE再生料简介");document.write("</a>");document.write("<br />·<a href='article/");document.write("201708");document.write("/");document.write("468");document.write(".html'>下一条：");document.write("学会区分PE胶袋与普通胶袋");document.write("</a>");