[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f1ZFYaesZ8kdBW9kuEm_9NG641uWVZY_7Me29xMP6Gps":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":14,"related":15,"source":21,"type":22},[],"2023-11-19 14:58:30",106807603,[8,9],"正确","错误",{"courseId":11,"courseImg":12,"courseName":13},"433948c646892fec7f9a6b926aa56ab5","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F84f48179a387c3eba6d1cdd8fcffd4b3.jpg","数据库原理与应用(Database Theory and Application)","Relationships can not have attributes",[16,23,26,31,37],{"answer":17,"createTime":5,"id":18,"options":19,"question":20,"source":21,"type":22},[],106807602,[8,9],"Every entity in the entity-set can has different set of attributes","v1",3,{"answer":24,"createTime":5,"id":6,"options":25,"question":14,"source":21,"type":22},[],[8,9],{"answer":27,"createTime":5,"id":28,"options":29,"question":30,"source":21,"type":22},[],106807604,[8,9],"The basis for distinguishing between different entities is NAME",{"answer":32,"createTime":33,"id":34,"options":35,"question":36,"source":21,"type":22},[],"2023-11-19 14:58:31",106807607,[8,9],"the mapping cardinality of entity-sets students and courses is one-to-many mapping",{"answer":38,"createTime":33,"id":39,"options":40,"question":41,"source":21,"type":22},[],106807609,[8,9],"Entity refers to something that exists objectively in the real world. Conceptual things cannot be called entities"]