CSS：闭合元素和浮动元素的差别

width:440px;
margin:10px;
clear:both;
}
.div1,
.div2p{...}{
float:left;
width:80px;
margin:8px;
display:inline;
}

XHTML：
<divclass="wrap">
<divclass="div1">div1，浮动</div>
<divclass="div2">
<pclass="div2p">div2内p1</p>
<pclass="div2p">div2内p2</p>
<pclass="div2p3">div2内p3，不浮动</p>
</div>