console 命令行工具 X clear
console
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>课程表</title>
</head>

<body>
    <table border="1" bgcolor="pink">
        <cellspacing="5" cellpadding="10" rules=>
            <caption>课程表</caption>
            <tr>
                <th>星期一</th>
                <th>星期二</th>
                <th>星期三</th>
                <th>星期四</th>
            </tr>
            <!--alt+shift+向下箭头-->
            <tr>
                <td>语文</td>
                <td>数学</td>
                <td>英语</td>
                <td>生物</td>
            </tr>
            <tr>
                <td>语文</td>
                <td>数学</td>
                <td>英语</td>
                <td>生物</td>
            </tr>
    </table>
</body>

</html>