手机通讯录系统 (1)查看功能(2)当选中某类时,显示出此类所有数据中的姓名和电话号码 (3)添加数据功能(4)修改功能： (5)删除功能： -The phone contacts system (1) function (2) the elected Certain shows the name and phone number in all such data (3) add data function (4) modify the function: (5) Delete