题目内容

数据库的完整性是指数据的相容性

A. 对
B. 错

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插入或对主码列进行更新操作时,关系数据库管理系统按照实体完整性规则自动进行检查

A. 对
B. 错

What kind of locals tourists usually meet in Third-World countries?

Why do all resorts look so much alike?

What’s the advantage of traveling in a way that integrates you into your new surroundings?

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