（单选题）
为一个HTML文档加一个标题应该使用的HTML标记是：（）

…
B…
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D…</p></div><div class="info"><div class="title"><h4><i class="ax-iconfont ax-icon-check-o-gap"> </i> 正确答案</h4></div><div class="text"><img alt="来源：www.examk.com" src="data:image/png;base64,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" /></div></div><div class="info"><div class="title"><h4><i class="ax-iconfont ax-icon-question-o"> </i> 答案解析</h4></div><div class="text"> 略 </div></div><script>rewardHtml()</script></div><div class="pre ax-align-center" id="qa-pre"><span class="ax-loading"><i></i></span></div><div class="box"><div class="head"><h2 class="title"><i class="ax-iconfont ax-icon-compass"></i> 相似试题</h2></div><ul class="list list-1"><li><p class="mode">（单选题）</p><p class="title">为了标识一个HTML文档应该使用的HTML标记是（）。</p><p class="more"><a target="_blank" href="/p/431145164.html" class="ax-btn ax-primary ax-line">答案解析</a></p></li><li><p class="mode">（单选题）</p><p class="title">DOM为HTML文档定义了一个与平台无关的程序接口，使用该接口不可以控制文档的（）。</p><p class="more"><a target="_blank" href="/p/3418214313.html" class="ax-btn ax-primary ax-line">答案解析</a></p></li><li><p class="mode">（单选题）</p><p class="title">为了标识一个HTML文件应该使用的HTML标记是（）</p><p class="more"><a target="_blank" href="/p/2921438170.html" class="ax-btn ax-primary ax-line">答案解析</a></p></li><li><p 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