abstract：<!DOCTYPE html> <html lang="zh"> <head> <title>标题</title> <style> #blue{ border:1px solid blue; } </style> </head> <bod
<!DOCTYPE html>
<html lang="zh">
<head>
<title>标题</title>
<style>
#blue{
border:1px solid blue;
}
</style>
</head>
<body>
<div id="blue">蓝色</div>
</body>
</html>
Correcting teacher：西门大官人Correction time：2019-04-22 10:30:04
Teacher's summary：代码不多，程序没有问题。最好上传一下运行的效果图