单选题
一个HTML文件的起始标记为（）。
A
B
</p><p><span>C</span><html></p><p><span>D</span><meta><meta /></p></div><div class="info"><h3 class="title">正确答案</h3><script>ai2();</script><div class="text"><img alt="来源：www.examk.com" 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" /></div></div><div class="info"><h3 class="title">答案解析</h3><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></div><div class="box"><div class="hd"><div class="title title--blue"><i class="icon"></i><span>相似试题</span></div></div><ul class="qlist"><li><p class="text">在Outlook中可以借助（）的方式传送一个文件。</p><p class="ft"><span class="mode">单选题</span><a href="/p/3242126849.html" class="btn-outline">查看答案</a></p></li><li><p class="text">在Outlook中，通常借助（）来传送一个文件。</p><p class="ft"><span class="mode">单选题</span><a href="/p/3657017124.html" class="btn-outline">查看答案</a></p></li><li><p class="text">某Internet主页的URL地址为http：//www.test.com.cn／product／index.html，该地址的域名是（）。</p><p class="ft"><span class="mode">单选题</span><a href="/p/954835113.html" 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