1019作业

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    <title>Document</title>
    <style type="text/css">
        a[href="2.html"]{
            color: aqua;
        }
        #mv{
            color: blue;
        }
        a{
            color: violet;
        }
        p,span{
            color: red;
        }
    </style>
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    <div>
        <nav>
            <a href="2.html" target="tac">首页</a>
            <a id="mv" href="3.html" target="tac">导航</a>
            <a href="4.html" target="tac">导航</a>
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        </nav>
        <p>xcvvcxvxcvxcvxcv</p>
        <span>xcxcccccccc</span>
    </div>
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        <iframe src="2.html" name="tac"></iframe>
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