下列叙述中正确的是______。A.软件交付使用后还需要进行维护 B.软件一旦交

题型:单项选择题

问题:

下列叙述中正确的是______。

A.软件交付使用后还需要进行维护

B.软件一旦交付使用就不需要再进行维护

C.软件交付使用后其生命周期就结束

D.软件维护是指修复程序中被破坏的指令

考点:计算机等级考试C语言计算机二级(C)16
题型:单项选择题

下列关于骨膜的描述正确的是()

A.包裹在整个骨的外面

B.外层有产生新骨的功能

C.富有血管、神经但无淋巴管

D.对骨损伤的修复无作用

E.是由纤维结缔组织构成的膜

题型:单项选择题

在合上设备总开关,接通电源前要()

A.清理现场

B.仔细检查设备有无异常,相关工作是否准备好

C.准备原材料

D.准备工具、工装

题型:单项选择题

牙周病的全身易感因素不包括下列哪一项()

A.性激素的变化

B.吸烟

C.不良的正畸治疗

D.艾滋病

E.精神压力过大

题型:单项选择题

筛号数越小,粉末越细。

题型:单项选择题

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.

19()

A.likely

B.likewise

C.certainly

D.otherwise

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