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<div class="dropdown"> <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown"> 下拉菜单<span class="caret"></span> </button> <ul class="dropdown-menu"> <li><a href="#">菜单项1</a></li> <li class="disabled"><a href="#">菜单项2</a></li> <li><a href="#">菜单项3</a></li> </ul> </div>
