<div style="width: 300px; height: 28px; line-height: 28px; border: 1px solid #ccc; font-size: 12px; text-align: center;">
<ul style="list-style: none; margin: 0; padding: 0; float: left; position: relative; left: 50%;">
<li style="float: left; position: relative; right: 50%;">1.万年洪水</li>
<li style="float: left; position: relative; right: 50%; margin: 0 20px 0 20px;">2.千年洪水</li>
<li style="float: left; position: relative; right: 50%;">3.百年洪水</li>
</ul>
<div style="clear: both;"></div>
</div>
<div style="width: 300px; height: 28px; line-height: 28px; border: 1px solid #ccc; font-size: 12px; text-align: center;">
<ul style="list-style: none; margin: 0; padding: 0; display: inline-block; *display: inline; zoom: 1;">
<li style="float: left;">1.万年洪水</li>
<li style="float: left; margin: 0 20px 0 20px;">2.千年洪水</li>
<li style="float: left;">3.百年洪水</li>
</ul>
<div style="clear: both;"></div>
</div>
