游标是系统为用户开设的一个()。A.内存空间 B.数据缓冲区 C.外存空间 D.虚拟

题型:单项选择题

问题:

游标是系统为用户开设的一个()。

A.内存空间

B.数据缓冲区

C.外存空间

D.虚拟空间

考点:计算机等级考试数据库技术计算机三级(数据库技术)27
题型:单项选择题

Boys and girls, let’s begin our English class now. This time I want to talk about my family. Then I want you to say something about my families.

There are seven people in my family. They are my parents, my two sisters, my brother, my wife (妻子)and I. In England, a family like this is a big one. My father has a factory(工厂). It isn’t very big. It makes all kinds of boats. My brother is a doctor. He works in a hospital(医院). His wife works in a hospital, too. She is a nurse. My two sisters are students. One want to be a teacher. She studies hard and well. The other likes singing very much and can sing very well. So she wants to be a singer(歌手). I’m now in China teaching English and learning Chinese. My mother stays at home. Can you guess (猜测)what she does at home? Yes, she does housework. She is a housewife.

小题1:Where do I come from?

A.China

B.America

C.England

D.Canada小题2: Where am I now ?

A.In China

B.In America

C.In England

D.In Canada小题3:Who works in a school in my family?

A.One of my sisters

B.I

C.My father

D.My brother小题4: My brother and his wife work _________.

A.as teachers

B.as nurses

C.as doctors

D.in a hospital小题5:In Chinese “ housewife” means_________ .

A.干家务活的人

B.在家的妻子

C.家庭主妇

D.保姆

题型:单项选择题

均匀分布在地球赤道平面上空的三颗同步通信卫星能够实现除地球南北极等少数地区外的“全球通信”。已知地球半径为R,地球表面的重力加速度为g,地球自转周期为T,求:三颗卫星中任意两颗卫星间距离s的表达式。

题型:单项选择题

关于债券发行方式,下列说法不正确的是( )。

A.定向发行,又称私募发行,私下发行,即面向少数特定投资者发行

B.承购包销,指发行人与由商业银行、证券公司等金融机构组成的承销团通过协商条件签订承购包销合同,由承销团分销拟发行债券的发行方式

C.招标发行,指通过招标方式确定债券承销商和发行条件的发行方式

D.根据中标规则不同,债券发行的定价方式可分为美式招标(单一价格中标)和荷兰式招标(多种价格中标)

题型:单项选择题

把最重要的操纵器和显示器配置在最佳的作业范围内。这是控制与显示系统的设计的什么原则()。

A.功能性

B.准确性

C.关联性

D.优先性

题型:单项选择题

龟兔赛跑,全程3000米,龟每分钟爬30米,兔每分钟跑325米,兔子自以为速度快,在途中睡了一觉。结果龟到达终点时,兔离终点还有400米,问兔睡了多少分钟( )

A.100
B.92
C.86
D.75

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