【判断题】【消耗次数：1】
在数据库设计中，数据流图是用来建立概念模型的。
①
正确
②
错误
参考答案：
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相关题目
【多选题】
在数据库中，概念模型的相关表述不正确的是？
①
用于现实的建模，与具体的DBMS有关
②
用于信息世界的建模，与具体的DBMS有关
③
用于现实的建模，与具体的DBMS无关
④
用于信息世界的建模，与具体的DBMS无关
【简答题】
在数据库设计中，数据字典在[填空]阶段建立，在数据库设计过程中不断修改、充实、完善。
随机题目
【单选题】
由于幼儿的肌肉中水分多，蛋白质及糖原少，不适合他们的运动项目是( )。
①
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②
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③
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④
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