问题
单项选择题
一个HTML 文件的启始标记为（ ）。
A．
B．
</p><p>C．<html> </p><p>D．<meta></p>
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<p>参考答案：C</p> </div>
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<span class="text_left reb">单项选择题 A1/A2型题</span>
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<a href="https://app.ixiawen.com/question/30661733/ee5fd6525d796bcd2767eea36f659f20.html" class="black" target="_blank"><p>人生三阶段中，人生保护阶段针对的是（）。</p><p>A.婴幼儿时期和儿童时期</p><p>B.青春期</p><p>C.中年时期</p><p>D.老年时期</p><p>E.以上均不正确</p></a>
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