题目内容

下列选项哪些是数据库管理系统的名称?

Access
B. Windows
C. MySQL
D. SQL Server
E. DB

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在数据库系统中,下列选项哪些属于数据完整性约束范畴?

A. 属性值范围
B. 密码验证
C. 用户授权
D. 关键字的值非空
E. 数据类型

下列选项哪些是关系数据库表的特性?

A. 属性不可重名
B. 属性的有限性
C. 属性顺序非常重要
D. 元组的无限性
E. 元组顺序无关紧要
F. 同一属性具有相同值域

Section A.1.A) Oh, yes, pleaseB) I like it very much .C) Sit down please.D) Fine, And you?2.A) Take careB) My pleasureC) It’s greatD) This way,please.3.A) See you tomorrowB) OK, it doesn’t matterC) Sorry, our rooms are bookedD) Here is the room key4.A) Have a nice dayB) Yes, pleaseC) Don’t do itD) Let’s go5.A) Certainly. Is Friday OK?B) So long.C) Hurry upD) Mind steps6.A) Coffee, please.B ) I’m fine, thank you.C) Your telephone number, pleaseD) Yes, Here you are.7.A) Don’t worry.B) All rightC) Good luckD) Never mind

Section D.Volunteers are our heart and soul. Please come and help us build homes for _____(20) low-income families. There is no experience needed and we supply the _____(21).Just volunteer for a day, It’s fun, rewarding and you can learn some _____(22). If building isn’t your thing, come and volunteer for one of our events or _____(23). You must be _____(24) 14 years of age to volunteer and those 15 years and under must come with a parent. Come and sign up now to volunteer your time.

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