设置CSS可以容纳盒子的最小高度
的最小高度属性用于设置的最小高度，一个盒即可。min-height属性的值可以是数字，长度或百分比。
示例
<html>
<head>
</head>
<body>
<p style = "width:400px; min-height:150px; border:1px solid blue; padding:5px; margin:10px;">
This paragraph is 400px wide and min height is 150px
This paragraph is 400px wide and min height is 150px
This paragraph is 400px wide and min height is 150px
This paragraph is 400px wide and min height is 150px
</p>
<img alt = "logo" src = "/css/images/logo.png" width = "100" height = "100" />
</body>
</html>