[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fq5RN8Tgl2-OCN0JkqHY7fqZ10q36mWOsBimlPiYN0JU":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":14,"related":15,"source":19,"type":20},[],"2023-11-19 14:58:30",106807602,[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)","Every entity in the entity-set can has different set of attributes",[16,21,26,31,37],{"answer":17,"createTime":5,"id":6,"options":18,"question":14,"source":19,"type":20},[],[8,9],"v1",3,{"answer":22,"createTime":5,"id":23,"options":24,"question":25,"source":19,"type":20},[],106807603,[8,9],"Relationships can not have attributes",{"answer":27,"createTime":5,"id":28,"options":29,"question":30,"source":19,"type":20},[],106807604,[8,9],"The basis for distinguishing between different entities is NAME",{"answer":32,"createTime":33,"id":34,"options":35,"question":36,"source":19,"type":20},[],"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":19,"type":20},[],106807609,[8,9],"Entity refers to something that exists objectively in the real world. Conceptual things cannot be called entities"]