准备工作
html示例:
<?xml version="1.0" encoding="UTF-8"?>
<html
<head>
<title>text</title>
</head>
<body>
<div class="cdiv">
<p class="cp1 section">test p1 <span>next p1</span></p>
<ul>
<li id="0">1</li>
<li id="1">2</li>
<li id="2">3</li>
</ul>
</div>
<div class="cdiv1">
<p class="cp2">test p2 <span>next p2
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