下列说法不正确的是()。
A. 数据库减少了数据冗余
B. 数据库中的数据可以共享
C. 数据库避免了一切数据的重复
D. 数据库具有较高的数据独立
位于用户与操作系统(OS)之间的一层数据管理软件称为,它为用户或应用程序提供访问数据库的方法,是数据库系统的核心。
1) Whichsentence about Gina and Steve's school is correct?
A. You can buy only healthy soda.
B. All sodas at the school cost more now.
C. Theschool has stopped selling soda completely.
Whyis the school doing this?
A. Theschool wants students to save money.
B. Theschool wants to make more money.
C. Theschool wants students to drink less soda.