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源代码：
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<!DOCTYPE html> <html> <head> <script src="//libs.baidu.com/jquery/1.10.2/jquery.min.js"> </script> <script> $(document).ready(function(){ $("p:last").css("background-color","yellow"); }); </script> </head> <body> <p>This is the first paragraph.</p> <p>This is the second paragraph.</p> <p>This is the last paragraph.</p> </body> </html>
运行结果
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