[]load数组加载如何实现多维？

loadfile = [

{url:"/bin/res/load/b.png",type:Laya.Loader.IMAGE},

{url:"/bin/res/load/a.png",type:Laya.Loader.IMAGE},

{url:"/bin/res/load/b.png",type:Laya.Loader.IMAGE},

{url:"/bin/res/load/a.png",type:Laya.Loader.IMAGE},

{url:"/bin/res/load/b.png",type:Laya.Loader.IMAGE},

{url:"/bin/res/load/a.png",type:Laya.Loader.IMAGE},

{url:"/bin/res/load/b.png",type:Laya.Loader.IMAGE},

{url:"/bin/res/load/comp.mp3",type:Laya.Loader.getRes},

];