<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div style="width: 20%;background-color: brown;float: left">1</div>
<div style="width: 80%;background-color: aquamarine;float: left">2</div>
</body>
</html>
可以解决拼接行的问题。