题目内容：
数据库系统的核心是（ ）
A．数据模型 B．数据库管理系统
C．数据库
D．数据库管理员
参考答案：
答案解析：
单选题：数据库系统的核心是（ ）
- 题目分类：公共基础知识
- 题目类型：单选题
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B．数据库管理系统
C．数据库
D．数据库管理员
B．数据库管理系统
C．数据库
D．数据库管理员
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