CSS代码：

.box{padding:10px; background:gray;}
.fix{*zoom:1;}
.fix:after{display:block; content:"clear"; height:0; clear:both; overflow:hidden; visibility:hidden;}
.l{float:left;}

HTML代码：

<p class="box fix">
    <img class="l" src=/uploadfile/2017/0829/20170829043231689.jpg" />
</p>