老师检查一下，我的方法有没有更专业的优化手段，还是从就业的角度来说可以这样写呢？

3-16

粘贴全部相关代码，切记添加代码注释（请勿截图）

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title>:nth-child()</title>
    <style type="text/css">
        /*此处补充样式*/
        tr>th {
            background-color: yellow;
        }
        
        tbody>tr:nth-child(2n+1) {
            color: orange;
        }
        
        tbody>tr:nth-child(2n+2) {
            color: green;
        }
    </style>
</head>
<body>
    <table border="1" cellspacing="0" width="200">
        <thead>
            <tr>
                <th>序号</th>
                <th>姓名</th>
                <th>性别</th>
                <th>年纪</th>
            </tr>
        </thead>
        <tbody> 
            <tr>
                <td>1</td>
                <td>张三</td>
                <td>男</td>
                <td>12</td>
            </tr>
            <tr>
                <td>2</td>
                <td>李四</td>
                <td>女</td>
                <td>11</td>
            </tr>
            <tr>
                <td>3</td>
                <td>赵五</td>
                <td>男</td>
                <td>12</td>
            </tr>
            <tr>
                <td>4</td>
                <td>王二</td>
                <td>男</td>
                <td>12</td>
            </tr>
        </tbody>  
    </table> 
</body>
</html>

慕沐8204582 2020-10-15

源自：CSS3选择器 3-16 编程练习