document.write('<li><a href="http://yun.itheima.com/course/640.html?seonews" target="_blank"><h3>Kubernetes(K8S)超快速入门教程</h3><div class="side_fr"><div class="img_box"><img src="http://yun.itheima.com/Upload/./Images/20210416/6079672ce9538.jpg"/></div><div class="btm"><span class="span1">初级</span><p>134353人学习</p><span class="span2">5.0分</span></div></div></a></li><li><a href="http://yun.itheima.com/course/398.html?seonews" target="_blank"><h3>网络安全+运维进阶教程—学以致用，得心应手</h3><div class="side_fr"><div class="img_box"><img src="http://yun.itheima.com/Upload/./Images/20190114/5c3c3ce5e69c7.JPG"/></div><div class="btm"><span class="span1">中级</span><p>90288人学习</p><span class="span2">4.6分</span></div></div></a></li><li><a href="http://yun.itheima.com/course/555.html?seonews" target="_blank"><h3>Linux运维189讲系统教程</h3><div class="side_fr"><div class="img_box"><img src="http://yun.itheima.com/Upload/./Images/20190730/5d3ff3019aa78.jpg"/></div><div class="btm"><span class="span1">初级</span><p>118114人学习</p><span class="span2">5.0分</span></div></div></a></li><li><a href="http://yun.itheima.com/course/348.html?seonews" target="_blank"><h3>网络安全运维基础入门</h3><div class="side_fr"><div class="img_box"><img src="http://yun.itheima.com/Upload/./Images/20180326/5ab8a9008b476.jpg"/></div><div class="btm"><span class="span1">初级</span><p>76645人学习</p><span class="span2">5.0分</span></div></div></a></li>')