document.write('<ul>');
document.write('<li><a href="writing.html">论文写作</a></li>');
document.write('辅导完成高质量的论文。');
document.write('<li><a href="publish.html">论文发表</a></li>');
document.write('将论文发表至国家级和省级期刊。');
document.write('</ul>');