<div> <div id="tab"> <h2>标题一</h2> <h2>标题二</h2> <h2>标题三</h2> <h2>标题四</h2> div> <dl id="tabcon"> <dd>内容一</dd> <dd>内容二</dd> <dd>内容三</dd> <dd>内容四</dd> </dl> <div>

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