4-7麻烦老师帮忙提示一下
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>display属性</title>
<style type="text/css">
/*样式补充*/
body,div{margin:0px;padding:0px;font-family:"宋体";}
ul{list-style:none;}
.big{width:260px;background-color:#f2f4f6;border:1px #ececec ;margin:0 auto;}
.div1 .div2 .div3{width:100%;height:50px;background-color:#040a10;text-align: center;}
.elec .wash .clothes{font-size:12px;}
li{display:none;}
div:hover li{display:block;}
</style>
</head>
<body>
<div class="big">
<div class="div1">
<h3 class="content1">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 class="content2">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 class="content3">衣物</h3>
<ul class="clothes">
<li>衬衫</li>
<li>裤子</li>
<li>卫衣</li>
</ul>
</div>
</div>
</body>
</html>
我没有实现最后的效果。
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