题目：
数据库系统设计过程中数据库维护阶段的工作包括日常维护、定期维护和 ______3个方面。
A．故障维护
B．设备维护
C．库结构修改
D．应用程序修改
答案：
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参考答案：A
数据库系统设计过程中数据库维护阶段的工作包括日常维护、定期维护和 ______3个方
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