【多选题】【消耗次数：1】
数据库恢复技术可以保证数据库事务的________
①
原子性
②
一致性
③
隔离性
④
持久性
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什么是数据库完整性，关系数据库的数据库完整性主要有哪些？
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数据库系统中，物理数据独立性是指（ ）。
①
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②
B.应用程序与DBMS的相互独立
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D.应用程序与数据库中数据的逻辑结构相互独立
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