<!DOCTYPE html><html><head> <meta charset="UTF-8"> <title>test</title> <style type="text/css"> .item{ width:200px; height: 100px; background: yellow; } .item span{ display: block; margin: 0 5px; width:50px; height: 50px; background:blue; float: left; } .myc{ background-color: red; } </style></head><body> <div class="item"> <span class="myc" >11</span> <span></span> <span></span> </div></body></html>
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