document.writeln("<Center><div class=\"doc\"><a href=\'/e/member/fava/add/?classid=41&id=6690\'  target=\'_self\'><i class=\"fa fa-file-word-o\"></i> 分析高中化学必修1《氨 铵盐》教学的案例教育论文文档下载.doc </a></div></Center>");