DIV 几行几列 2个列如何隔开一些?

列与列之间不空一些 ?都挨着的,下面的DIV如何调整呢?

语句:select * from KS_Class where ClassID in(510,511,512,513,514,546)

[loop=10]
<div style="width:50%; height:30px; float:left; border:1px solid #CCCCCC; padding-right:0px; padding-left:0px; margin-bottom:6px;">
     <div style="height:28px; background-image:url(/images/title-bg.gif); border-bottom:1px solid #CCCCCC">{$Field(FolderName,Text,0,...,0,)}</div>
   <div style="width:300px; height:123px; float:right; border:0px solid #CCCCCC;">bbb</div>
 </div>
 [/loop]
此主题相关图片如下：1.jpg