看1 可售图书信息的录入，修改，栓除及图书库存管理 2图书销售处理 3 查询图书库存及销售情况，以及对销售及古村进行统计4 系统维护，修改密码 数据库备份 -see a sell books information input, modify, in addition to books and suppository inventory management two book sales for three books dealing with inventory

1 可售图书信息的录入，修改，栓除及图书库存管理 2图书销售处理 3 查询图书库存及销售情况，以及对销售及-selling a book recording the information, modify, in addition to books and suppository inventory management two book sales for three books dealing with inventory and sales, and the sal