A.文件系统不能解决数据冗余和数据独立性问题，而数据库系统可解决这类问题

B.文件系统只能管理少量数据，而数据库系统则能管理大量数据

C.文件系统只能管理程序文件，而数据库系统则能管理各种类型的文件

D.文件系统简单，而数据库系统复杂

-A. file system can not solve the data redundancy and data independence, and database systems solve these problems B. document management system can only be a small amount of data and database systems with the ability to manage large amounts of data C. document management system can only process documents and the database system is able to control Jimmy D. various types of paper document system simple and complex database system