麻烦老师检查下有没语法错误，并且说下哪里可以优化简写的
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>display属性</title>
<style type ="text/css">
body,div,h3,ul,li{padding:0;margin:0;}
li{list-style:none;}
h3{font-size:24px;font-family:宋体;padding:8px;}
div{border:1px #e3e1e1 solid;}
li{background-color:white;}
ul{line-height:30px;}
.big{text-align:center;background-color:#ececec;width:180px;margin:0px auto;}
ul{display:none;}
.div1:hover ul{display:block;}
.div2:hover ul{display:block;}
.div3:hover ul{display:block;}
/*样式补充*/
</style>
</head>
<body>
<div class="big">
<div class="div1">
<h3>家电</h3>
<ul class="elec">
<li>冰箱</li>
<li>洗衣机</li>
<li>空调</li>
</ul>
</div>
<div class="div2">
<h3>洗护</h3>
<ul class="wash">
<li>洗衣液</li>
<li>消毒液</li>
<li>柔顺剂</li>
</ul>
</div>
<div class="div3">
<h3>衣物</h3>
<ul class="clothes">
<li>衬衫</li>
<li>裤子</li>
<li>卫衣</li>
</ul>
</div>
</div>
</body>
</html>0
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