RUNOOB.COM
源代码：
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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>电脑学习网教程(runoob.com)</title> <style> p { border-style:solid; border-left-color:#ff0000; } </style> </head> <body> <p>This is some text in a paragraph.</p> </body> </html>
运行结果