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<!DOCTYPE html> <html> <head> <script src="/jquery/jquery.min.js"></script> </head> <body> <h1>设置 HTML</h1> <div id="01"> <h2>Hello China!</h2> </div> <div id="02"> <h2>Hello World!</h2> </div> <p id="demo"></p> <script> $(document).ready(function() { var myElement = $("#02"); myElement.html("<h2>Hello Shanghai!</h2>"); }); </script> </body> </html>