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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>在线尝试 Bootstrap 实例</title> <link rel="stylesheet" href="http://cdn.static.w3big.com/libs/bootstrap/3.3.7/css/bootstrap.min.css"> <script src="http://cdn.static.w3big.com/libs/jquery/2.1.1/jquery.min.js"></script> <script src="http://cdn.static.w3big.com/libs/bootstrap/3.3.7/js/bootstrap.min.js"></script> </head> <body> <h1>Hello, world!</h1> </body> </html>