<html lang="en">
<head>
<meta charset="utf-8">
<title>Day05</title>
<link rel="stylesheet" href="Day05.css" type="text/css">
</head>
<body>
<!-- 父子选择器 & 直接子元素选择器 -->
<!-- <div>
<span class="guamaa">
<em class="box">额滴圣剑</em>
</span>
</div>
<p>
<em>123</em>
<strong>
<em>123</em>
</strong>
</p> -->
<!-- <div>1</div>
<div class="box">123</div>
<p class="box">234</p> -->
<!-- <div class="demo1"></div>
<div class="demo2"></div> -->
<!-- <div>
芜湖
</div> -->
<div></div>
<div class="demo1">
</div>
</body>
</html>
