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| <!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
.one{
width: 600px;
height: 600px;
background-color: pink;
display: none;
}
.one:hover{
display: block;
background-color: blue;
}
</style>
</head>
<body>
<div class="one">
</div>
<h1>测试显隐性</h1>
</body>
</html>
|