当数据的物理结构(存储结构、存取方式等) 改变时,不影响数据库的逻辑结构,从而不会引

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当数据的物理结构(存储结构、存取方式等) 改变时,不影响数据库的逻辑结构,从而不会引起应用程序的变化,这是指数据的

考点:计算机等级考试C++二级C++笔试
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国有独资企业、国有独资公司、国有资本控股公司的董事、监事、高级管理人员违反规定,造成国有资产特别重大损失被免职的,自免职之日起5年内不得担任国有独资企业、国有独资公司、国有资本控股公司的董事、监事、高级管理人员。( )

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以下属于三级处理方法的是()

A.生物脱氮除磷法

B.生物膜法

C.筛滤法

D.活性污泥法

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在公路设计时,我国规定高速公路和具有干线功能的一级公路设计交通量按()预测

A.5年

B.10年

C.20年

D.30年

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Personality is to a large extent inherent. A-type parents usually (1) A-type offspring. But the environment must also have a profound effect (2) if competition is important to the parents, it is (3) to become a major factor in the lives of their children.

One place where children (4) A characteristics is school, which is, (5) its very nature, a highly competitive institution. Too many schools (6) the "win at all costs" moral standard and measure their success by sporting achievements. The current (7) for making children compete against their classmates or against the (8) produces a two-layer system, in which competitive A types seem in some way better than their B type fellows. Being too (9) to win can have dangerous consequences: remember that Pheidippides, the first marathon runner, (10) dead seconds after saying. "Rejoice, we conquer!"

(11) the worst form of competition in schools is the disproportionate emphasis on examinations. There is, for example, a (12) school that allows pupils to concentrate on those things they do well. The (13) of competition by examination are somewhat questionable, but competition in the certain (14) of failure is positively harmful.

(15) , it is neither practical nor desirable that all A youngsters change into B’s. The world needs types, and schools have an important duty to try to (16) a child’s personality to his possible future employment. It is top management.

If the preoccupation of schools with academic work was (17) , more time might be spent teaching children surer values. Perhaps selection (18) the caring professions, especially medicine, could be made less by good grades in chemistry and more by such (19) as sensitivity and sympathy. It is surely a mistake to choose our doctors exclusively from A type stock. B’s are important and should be (20) .

18()

A.for

B.of

C.by

D.to

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对开式滑动轴承的内表面怎样进行粗刮,怎样进行精刮?

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