.mk_list{ overflow:hidden}
.mk_list li{overflow:hidden; margin-bottom:30px; background-color:#fbfbfb}
.mk_list li:nth-of-type(odd) .mk_left{ float:left; width:300px; height:225px; overflow:hidden}
.mk_list li:nth-of-type(odd) .mk_right{ float:right; width:850px; height:auto; }
.mk_list li:nth-of-type(odd) .mk_right h1{ color:#333; font-size:22px; line-height:35px;}
.mk_list li:nth-of-type(odd) .mk_right h2{ font-size:16px; line-height:30px; color:#666; margin-top:30px; font-weight:100; margin-bottom:25px;}
.mk_list li:nth-of-type(even) .mk_left{ float:right; width:300px; height:225px; overflow:hidden}
.mk_list li:nth-of-type(even) .mk_right{ float:left; width:850px; height:auto; }
.mk_list li:nth-of-type(even) .mk_right h1{ color:#333; font-size:22px; line-height:35px;}
.mk_list li:nth-of-type(even) .mk_right h2{ font-size:16px; line-height:30px; color:#666; margin-top:30px; font-weight:100; margin-bottom:25px;}
.mk_list li .mk_left img{ width:100%; height:100%}
<!--内循环开始-->
<div class="coco mk_list">
<ul>
<li class="imgZoom wow animated fadeInUp" data-wow-delay="<%=i%>s">
<div class="mk_left"><img src="/<%=rsnfy("dk_uploadfile")%>" /></div>
<div class="mk_right">
<h1><%=rsnfy("title")%></h1>
<h2><%=rsnfy("description")%></h2>
</div>
</li>
</ul>
</div>
<!--内循环结束-->