[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fko2c8THEwYLbo1Q9eDnLqjaAG6P9-B1DoR7h9LV-8_s":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2025-06-29 06:43:33",209476535,[8,9,10,11],"概念模式","内模式","外模式","逻辑模式",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},10,"cf79216c2741c9511aa82211145cf5ba","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc9c546f99b5351b1d4396d6b1feaaaed.jpg","管理系统中计算机应用","work_42834305","章节测试1","数据库系统的三级模式中,能够给出数据库物理存储结构和物理存取方法的是_______",[21,32,41,50,59,68,71,81,87,92],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],209476530,[25,26,27,28],"网状模型","关系模型","层次模型","物理模型","_______模型是最早用于商品数据库管理系统的数据模型,其结构特点类似一个倒立的树","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],209476531,[36,37,38,39],"二维表","网状","一维表","树状","关系模型的数据结构可以用_______来表示",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],209476532,[45,46,47,48],"一个完整的数据库应用系统,比如图书管理系统","管理计算机所有硬件的程序系统","对数据库进行管理的软件集合,位于操作系统和用户之间","既包括计算机硬件也包括软件","数据库管理系统(DBMS)是_______",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],209476533,[54,55,56,57],"DBS包括DB和DBA不包括DBMS","DBMS包括DB、DBS和DBA","DB包括DBS、DBMS和DBA","DBS包括DB、DBMS和DBA","DB(数据库)、DBS(数据库系统)、DBMS(数据库管理系统)、DBA(数据库管理员)它们之间的关系是_______",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],209476534,[63,64,65,66],"三级模式和两级映射","数据共享性","数据的结构化","数据独立性","数据库系统的内部体系结构特征是_______",{"answer":69,"createTime":5,"id":6,"options":70,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":72,"createTime":73,"id":74,"options":75,"question":80,"source":30,"type":31},[],"2025-06-29 06:43:34",209476536,[76,77,78,79],"一对一","一对多","多对多","多对一","图书馆管理书籍,按图书类别将书籍进行分类管理,每本图书有唯一的书号,图书类别和书号的关系是_______",{"answer":82,"createTime":73,"id":83,"options":84,"question":85,"source":30,"type":86},[],209476537,[],"数据模型按不同应用层次分成:概念数据模型、_______和物理数据模型",2,{"answer":88,"createTime":73,"id":89,"options":90,"question":91,"source":30,"type":86},[],209476538,[],"在制作E-R概念模型图时,用_______形表示实体之间的联系,用_______形表示实体的属性",{"answer":93,"createTime":73,"id":94,"options":95,"question":96,"source":30,"type":86},[],209476539,[],"在关系数据库表的设计中,用_______保证有关联的表之间的联系"]