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You create a Web page that contains drop-down menus that are defined by using div tags in the following code.  You need to write a JavaScript function that will enable the drop-down menus to activate when the user positions the mouse over the menu title. Which code segment should you use?()

  • A、$(".dropdown-menu").hover( function () { $(".menu-items").slideDown(100); },function () {   $(".menu-items").slideUp(100); } );
  • B、$(".dropdown-menu").hover( function () { $(".menu-items", this).slideDown(100); },function (){ $(".menu-items", this).slideUp(100); } );
  • C、$(".dropdown-menu").hover( function () { $(this)".slideDown(100); }, function () {  $(this).slideUp(100);  } );
  • D、$(".dropdown-menu").hover( function () { $("this.menu-title",).slideDown(100); },function () {$("this.menu-title",).slideUp(100); } );
正确答案:B
答案解析:
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