试题内容
After acceptance and formal transfer of information systems to customers it has entered the stage of （）
A、preparation
B、operation and maintenance
C、development
D、extinction
软题库参考答案：B（仅供参考）
软题库解析：正在加载....
试题内容
After acceptance and formal transfer of information systems to customers it has entered the stage of （）
A、preparation
B、operation and maintenance
C、development
D、extinction
软题库参考答案：B（仅供参考）
软题库解析：正在加载....
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第11题：
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A． 数据完整性和约束完整性
B． 数据安全性和隐私性
C． 数据一致性和准确性
D． 数据可用性和可靠性