下列说法中,不属于数据模型所描述的内容的是()。 A.数据结构 B.数据操作 C.数

题型:单项选择题

问题:

下列说法中,不属于数据模型所描述的内容的是()。

A.数据结构

B.数据操作

C.数据查询

D.数据约束

考点:计算机等级考试公共基础知识二级公共基础知识
题型:单项选择题

What is a big dream?    小题1:   Or, is a big dream something that provides only entertainment? Children dream big dreams, but there are three barriers to realizing dreams. They often kill them before they ever have a chance to grow.

The Self

Immediately following the birth of a big dream, a negative self-talk takes over and gives all the reasons why it cannot happen. This inside voice is the ego(自我). It’s there for protecting and should be listened to.    小题2:   Most people are influenced by the inside voice. That’s why only a handful of people make their dream come true.

   小题3:   

Family and friends are a lot like the ego. They want to protect those they love, so they will often list all the reasons why the big dreams won’t come true. Sometimes, family and friends destroy dreams of those they love most, out of their own fear of being left behind.

The World

If one gets past the first two barriers, one has to face the world.   小题4:   In the past, big dreamers were locked up and sometimes even killed when they were shown to the world. Fortunately, in most of the world today, big dreamers just get laughed at.

The way to realize a big dream is with confidence and action. When children have confidence and then take action, they will be ready to accept any failure. The truth is that every great dreamer whose dreams have never seen the light of success knows failure well.   小题5:  

A.How Big Dreams Die

B.Family and Friends

C.Sometimes it is right, but more often it is wrong.

D.Does a big dream show one’s future?E. It is the last and the most terrible barrier.

F. And their big dream is to be a rock star or a famous artist.

G. They simply fail until they succeed.

题型:单项选择题

从地球仪和卫星图片上看,地球表面最显著的差别是[ ]

A.人类和生物的分布

B.陆地和海洋的分布

C.河流和湖泊的分布

D.山地和平原的分布

题型:单项选择题

“十一五”时期,我国研究与试验发展经费支出占国内生产总值比重计划提高到3%。

题型:单项选择题

荧光灯有何特点?

题型:单项选择题

男性患者,40岁,有反复发作无先兆性偏头痛病史多年。三年来反复出现头痛后,头痛侧眼球活动受限,持续数小时可缓解。MRI检查未见异常。该患者最可能的诊断是()。

A.眼肌麻痹型偏头痛

B.基底型偏头痛

C.普通型偏头痛

D.TIA

E.脑干梗死

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