<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>I</title>
</head>
<body>
<table border="8" bordercolor="green" width="650" height="200"
align="center" cellspacing="5">
<tr colspan="6">
<th>2020年1月考试安排</th>
<th></th>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<th>考试科目/日期</th>
<th>星期一</th>
<th>20200106</th>
<th>20200107</th>
<th>20200109</th>
<th>20200110</th>
</tr>
<tr>
<td>8:00-10:00</td>
<td>JSP</td>
<td></td>
<td>数学</td>
<td rowspn="2">网页设计</td>
<td>社会理论</td>
</tr>
<tr>
<td>2:00-4:00</td>
<td>英语</td>
<td>软件测试</td>
<td>PS</td>
<td>网页设计</td>
<td>c程序设计</td>
</tr>
</table>
</body>
</html>
写在th或者td上
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>I</title>
</head>
<body>
<table border="8" bordercolor="green" width="650" height="200" align="center" cellspacing="5">
<tr>
<th colspan="6">2020年1月考试安排</th>
</tr>
<tr>
<th>考试科目/日期</th>
<th>星期一</th>
<th>20200106</th>
<th>20200107</th>
<th>20200109</th>
<th>20200110</th>
</tr>
<tr>
<td>8:00-10:00</td>
<td>JSP</td>
<td></td>
<td>数学</td>
<td rowspan="2">网页设计</td>
<td>社会理论</td>
</tr>
<tr>
<td>2:00-4:00</td>
<td>英语</td>
<td>软件测试</td>
<td>PS</td>
<td>c程序设计</td>
</tr>
</table>
</body>
</html>