下面给出的是一份不完整的HTML文档，请根据HTML的基本语法规则补充填写①、 ②、③、④处所缺少的标记，并简要解释该文档中的标记
长江的组成及作用。 <①> <②>
中国河流介绍 </HEAD> <BODY> <H1>中国河流概况<③> <IMG SRC="D: /picture.jpg> <PRE>*****中国主要河流****</PRE> <A href＝＂F：/file1．html＂>长江</A> <A </div>
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分类：<a href="https://epsq.cn/category-987.html">计算机网络技术(02141)</a>
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发表：2024年08月13日 05时08分00秒 </li>
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下面给出的是一份不完整的HTML文档，请根据HTML的基本语法规则补充填写①、 ②、③、④处所缺少的标记，并简要解释该文档中的标记<A href=＂F：/file1．html＂> 长江</A>的组成及作用。 <①> <②> <TITLE>中国河流介绍 </HEAD> <BODY> <H1>中国河流概况<③> <IMG SRC="D: /picture.jpg> <PRE>*****中国主要河流****</PRE> <A href＝＂F：/file1．html＂>长江</A> <A href＝＂F：/file2．html＂>黄河</A> <A href＝＂F：/file3．html＂>黑龙江</A> <④> </HTML><br>【正确答案】：①HTML（2分）②HEAD（2分）③/H1（1分）④/BODY（1分）该标记是超文本链接标记<A>和</A>的一种具体构成形式。（1分）其中的 href是超文本链接标记中的一种属性，（1分）属性的值为超文本链接要跳转到的目的地，可以是本机上的一个文件名（这里是F：/file1．html），也可以是互联网上另一个网页的URL。（1分）标记间的字符串是被设置为超文本链接的一串文字（该标记中是“长江”），在浏览器中单击它即可实现跳转。（1分）<br> </div>
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