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<!DOCTYPE html><html lang="zh-CN"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>网站管理后台系统</title><style>h1{color: red;}.blue{color: blue;}#green{color: green;}h4,h5,h6{color: yellow;}</style></head><body><header><h1>网站后台管理系统</h1></header><section><p>admin</p><button onclick="location.href='logout.php'">退出</button></section><nav><a href="./test.html" target="admin">课程表</a><a href="./表单初试.html" target="admin">用户注册管理</a><a href="./img/video/1.mp4" target="admin">视频管理</a><a href="https://image.baidu.com/search/index?tn=baiduimage&ct=201326592&lm=-1&cl=2&ie=gb18030&word=%C3%C0%C5%AE&fr=ala&ala=1&alatpl=normal&pos=0&dyTabStr=MCwzLDIsMSw1LDgsNCw3LDYsOQ%3D%3D" target="admin">美女素材</a><a href="./导航.html" target="admin">导航系统</a></nav><iframe srcdoc="欢迎来到管理系统" name="admin" style='width: 1500px; height: 200px; '></iframe><div><h1>一级</h1><h2 class="blue">二级</h2><h3 id="green">三级</h3><h4>四级</h4><h5>五级</h5><h6>六级</h6></div></body></html>
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