（单选题）

一个HTML文件的起始标记为（）。

B</p><p><span>C</span><html></p><p><span>D</span><meta><meta /></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"> 本题考查应试者网页文件方面的基本知识。<br /> HTML文档是普通文本(ASCII)文件，它可以用任意编缉器生成。每个HTML文档应该包含一些标准HTML标记，每个文档都包含头head和正文body text两部分。头中含有标题title，正文中含有实际构成段落、列表和其他元素的文本。浏览器需要具体的信息是因为它们都是根据HTML和SGML说明编程的。<br /> ＜html＞、＜head＞、＜title＞和＜body＞标记是HTML文档中必须有的元素(和它们相应的结束标记)。其中＜html＞是一个HTML的起始标记，它的作用是让浏览器知道这是HTML文件。 </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">在Outlook中可以借助（）的方式传送一个文件。</p><p class="more"><a target="_blank" href="/p/3242126849.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">在Outlook中，通常借助（）来传送一个文件。</p><p class="more"><a target="_blank" 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