题目内容
Entities and relationships are to be distinguished using the concept of ____________ ____________.
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Object-based logical models are used for describing data at the ____________ and ____________ levels.
The three widely used record-based logical models are ____________ Model、____________ Model and ____________ Model.
Well known physical data models are ____________ model and ____________ ____________ model.
下面关于Spring MVC特点说法错误的是。()
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