编辑下面的代码:【加编码】
<html> <head> <title>Bootstrap 实例 - 下拉菜单(Dropdowns)</title> <link href="https://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet"> <script src="https://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script> <script src="https://libs.baidu.com/bootstrap/3.0.3/js/bootstrap.min.js"></script> </head> <body> <div class="dropdown"> <button type="button" class="btn dropdown-toggle" id="dropdownMenu1" data-toggle="dropdown"> 主题 <span class="caret"></span> </button> <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1"> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">Java</a> </li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">数据挖掘</a> </li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#"> 数据通信/网络 </a> </li> <li role="presentation" class="divider"> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">分离的链接</a> </li> </ul> </div> </body> </html>
结果: 【此窗口】 帮助?
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