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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
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<body>
<div id="a" style="height:100px; width:100px; background-color:yellow;">a</div>
<div id="b" style="height:100px; width:100px; background-color:blue;">b</div>
</body>
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