表格基础知识链接：http://blog.csdn.net/baidu_37107022/article/details/71713281
练习要求实现如下效果图：
代码演示
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style>
body{
background: #ebeff7;
}
/*清除表格默认样式*/
table{
border-collapse: collapse;
}
th,td{
padding: 0;
}
table{
width: 640px;
margin: 0 auto;
}
th,td{
border: 1px solid #99b0da;
text-align: center;
}
th{
font: 14px/30px "微软雅黑";
background: #dbe3fa;
}
td{
font: 12px/28px "微软雅黑";
background: #fff;
}
.bg{
background: #f4f7fc;
}
img{
vertical-align: middle;
}
.high{
color: #e54600;
}
.low{
color: #7171d1;
}
.space{
height: 4px;
border: none;
background: #ebeff7;
}
</style>
</head>
<body>
<table>
<thead>
<tr>
<th colspan="2">日期</th>
<th colspan="2">天气现象</th>
<th>气温</th>
<th>风向</th>
<th>风力</th>
</tr>
</thead>
<tbody>
<tr>
<td rowspan="2" class="bg">22日星期五</td>
<td class="bg">白天</td>
<td><img src="img/img_01.gif"/></td>
<td>晴间多云</td>
<td class="high">高温7C</td>
<td>无持续风向</td>
<td>微风</td>
</tr>
<tr>
<td class="bg">夜间</td>
<td><img src="img/img_02.gif"/></td>
<td>晴</td>
<td class="low">低温-4C</td>
<td>无持续风向</td>
<td>微风</td>
</tr>
<tr><td colspan="7" class="space"></td></tr>
<tr>
<td rowspan="2" class="bg">22日星期五</td>
<td class="bg">白天</td>
<td><img src="img/img_01.gif"/></td>
<td>晴间多云</td>
<td class="high">高温7C</td>
<td>无持续风向</td>
<td>微风</td>
</tr>
<tr>
<td class="bg">夜间</td>
<td><img src="img/img_02.gif"/></td>
<td>晴</td>
<td class="low">低温-4C</td>
<td>无持续风向</td>
<td>微风</td>
</tr>
</tbody>
</table>
</body>
</html>