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来源：3-31 编程练习
lcy_18
2020-12-07 13:50:24
<!DOCTYPE html>
<html>
<head>
<title></title>
<style type="text/css">
div{
width: 200px;
height:150px;
background-color: #eee;
margin-top: 5px;
}
section{
width: 200px;
height: 30px;
margin-bottom: 5px;
background-color: #ff0;
}
/*此处写代码*/
div:empty{
background-color: #f00;
}
section:empty{
background-color: #abcdef;
}
</style>
</head>
<body>
<div>
<section>one</section>
<section>two</section>
</div>
<div></div>
<div>
<section>three</section>
<section>four</section>
<section>five</section>
<section></section>
</div>
</body>
</html>
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1回答
-
同学你好，代码是正确的。继续加油，祝学习愉快！
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