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使用 css 设置框的最小高度

min-height属性用于设置盒子的最小高度。 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>