计算机信息系统是以（）为基础，以计算机为工具，为某一具体目标而实现的软件系统。
参考答案：数据库
The government will begin a series of_____ to help the public fully understand the new educational system．
A．applications
B．Presentations
C．traditions
D．administrations
When people are asked what kind of housing they need or want, the question（）a variety of answers.
A. defies
B. magnifies
C. mediates
D. evokes
