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源代码：
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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>安科教程(www.ancii.com)</title> <style> div { border:2px solid; padding:10px; background:#dddddd; border-top-left-radius:2em; -webkit-border-top-left-radius:2em; /* Safari */ } </style> </head> <body> <div>The border-top-left-radius property allows you to add a rounded border to the top-left corner.</div> </body> </html>
运行结果
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