目前PC中主存储器使用的RAM多采用MOS型半导体集成电路芯片制成,根据其保存数据的

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问题:

目前PC中主存储器使用的RAM多采用MOS型半导体集成电路芯片制成,根据其保存数据的机理可分为 【18】 和SRAM两大类。

考点:计算机等级考试PC技术三级PC技术笔试
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一辆轿车从上海到南京需行驶315千米,如果每小时行驶67千米,则需多少小时到达?

(得数保留一位小数)

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《建筑法》立法目的是为了加强建筑活动的监督管理,维护建筑市场秩序, ( ),促进建筑业健康发展。

A.保证业主和承建商合法权益
B.保证建筑工程的质量和安全
C.保证建筑活动依法开展
D.保证建设行政主管部门依法行政

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The "standard of living" of any country means the average person’s share of the goods and services which the country produces. A country’s standard of living, (1) , depends first and (2) on its capacity to produce wealth." Wealth" in this sense is not money, for we do not live on money (3) on things that money can buy. "Goods" such as food and clothing, and "services" such as transport and " (4) ". A country’s capacity to produce wealth depends upon many factors, most of (5) have an effect on one another. Wealth depends (6) a great extent upon a country’s natural resources. Some regions of the world are well supplied with coal and minerals, and have a fertile soil and a (7) climate; other regions possess none of them.

Next to natural resources (8) the ability to turn them to use. China is perhaps as well (9) as the USA in natural resources, but suffered for many years from civil and (10) wars, and (11) this and other reasons was (12) to develop her resources. (13) and stable political conditions, and (14) from foreign invasion, enable a country to develop its natural resources peacefully and steadily, and to produce more wealth than another country equally well (15) by nature but less well ordered.

A country’s standard of living does not only depend upon the wealth that is produced and consumed (16) its own borders, but also upon what is indirectly produced through international trade. (17) , Britain’s wealth in foodstuffs and other agricultural products would be much less if she had to depend only on (18) grown at home. Trade makes it possible for her surplus manufactured goods to be traded abroad for the agricultural products that would (19) be lacking. A country’s wealth is, therefore, much influenced by its manufacturing capacity, (20) that other countries can be found ready to accept its manufactures.

2()

A.primary

B.principal

C.foremost

D.uniquely

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依靠ISP和其他NSP的通信线路,在公用网络中建立自己的专用数据通信网络称之为()

A.虚拟私有网络

B.私有网络

C.公网

D.电子通道

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路面的基础

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