【单选题】【消耗次数：1】
下列属于数据库管理软件的是（ ）。
①
PPT
②
Word
③
Access
④
Outlook
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【单选题】
数据库管理系统是（ ）
①
A.采用了数据库技术的计算机系统
②
B.包括DBA、计算机硬件及DB的系统
③
C.位于用户与OS之间的数据管理软件
④
D.包括OS在内的数据管理软件
【单选题】
下列关于数据库管理系统的说法，错误的是（ ）。
①
数据库管理系统与操作系统有关，操作系统的类型决定了能够运行的数据库管理系统的类型
②
数据库管理系统对数据库文件的访问必须经过操作系统才能实现
③
数据库应用程序可以不经过数据库管理系统而直接读取数据库文件
④
数据库管理系统对用户隐藏了数据库文件的存放位置和文件名
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