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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