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<title>hello,world</title>
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<h1>hello,world</h1>
<a href="http://www.baidu.com" >百度</a>
<a href="s2.html" target="_blank">S2</a>
<div style="height:2000px;background-color:red;">第一章</div>
<div id="tt" style="height:2000px;background-color:green;">第二章</div>
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