目标图：
运行代码：
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<body>
<table border="3" align="center">
<tr>
<td colspan="7" align="center">课程表</td>
</tr>
<tr>
<td colspan="2" align="center">早 上</td>
<td>周一</td>
<td>周二</td>
<td>周三</td>
<td>周四</td>
<td align="center">周五</td>
</tr>
<tr>
<td rowspan="4" align="center" align="center">上 午</td>
<td>1</td>
<td rowspan="2">网页</td>
<td>动画</td>
<td rowspan="4">停课</td>
<td rowspan="2">网页</td>
<td align="center">影视</td>
</tr>
<tr>
<td>2</td>
<td rowspan="3">网页</td>
<td rowspan="2">课间休息</td>
</tr>
<tr>
<td>3</td>
<td>影视</td>
<td rowspan="2">动画</td>
</tr>
<tr>
<td>4</td>
<td>动画</td>
<td align="center">动画</td>
</tr>
<tr>
<td colspan="7" align="center">午 餐</td>
</tr>
<tr>
<td colspan="7" align="center">午 休</td>
</tr>
<tr>
<td colspan="2" align="center">下 午</td>
<td>周一</td>
<td>周二</td>
<td>周三</td>
<td>周四</td>
<td align="center">周五</td>
</tr><tr>
<td colspan="7" align="center">广播体操</td>
</tr>
<tr>
<td rowspan="2" align="center">下 午</td>
<td>1</td>
<td colspan="3" align="center">网页</td>
<td align="center">动画</td>
<td align="center">影视</td>
</tr><tr>
<td>2</td>
<td colspan="2" align="center">动画</td>
<td colspan="2" align="center">影视</td>
<td align="center">网页</td>
</tr>
<tr>
<td>放学时间</td>
<td> </td>
<td colspan="5" align="center">18:30</td>
</tr>
<tr>
<td colspan="7"> 
</tr>
</body>
</html>
Edge浏览器运行效果：
Google浏览器运行效果：
