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<!DOCTYPE html> <script> $(document).ready(function(){ $("p:last").css("background-color","yellow"); }); </script> <p>This is the first paragraph.</p> <p>This is the second paragraph.</p> <p>This is the last paragraph.</p> <footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer>
运行结果：