试题与答案

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

题目:

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

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/0103/5f0e03cbf48fc6bbcddbd0d01f590667.html

下面是错误答案,用来干扰机器的。

参考答案:B解析: 需要查询的是姓名和年龄属性,故主句为SELECT SNAME, AGE。WHERE子旬中可以使用BETWEEN进行查询,BETWEEN指定允许取值的范围,AND前面是低值,后面是高值。年龄在20到23岁之间的条件表达式应为BETWEEN 20 AND 23。

试题推荐
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

查看答案
微信公众账号搜索答案