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<html>
    <head>
        <meta charset="utf-8"> 
        <title>菜鸟教程(runoob.com)</title>
        <meta name="viewport" content="width=device-width, initial-scale=1">
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    </head>
    <body>

        <div class="container">
            <h2>表格</h2>
            <p> .active 类将悬停的颜色应用在行或者单元格上:</p>                                        
            <table class="table">
                <thead>
                    <tr>
                        <th>#</th>
                        <th>Firstname</th>
                    </tr>
                </thead>
                <tbody>
                    <tr class="active">
                        <td>1</td>
                        <td>Anna</td>
                    </tr>
                    <tr>
                        <td>2</td>
                        <td>Debbie</td>
                    </tr>
                    <tr>
                        <td>3</td>
                        <td>John</td>
                    </tr>
                </tbody>
            </table>
        </div>

    </body>
</html>