单选题DBMS是什么？（）A操作系统B数据库管理系统C数据库D数据库管理员
单选题
DBMS是什么？（）
A
操作系统
B
数据库管理系统
C
数据库
D
数据库管理员
参考解析
解析：
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问答题数据库系统的组成是什么？DBMS指的是什么？