将成绩表中总分字段的默认值设置为0,这属于定义数据______完整性。

题型:填空题

问题:

将成绩表中总分字段的默认值设置为0,这属于定义数据______完整性。

考点:计算机等级考试VISUALFOXPRO二级VISUALFOXPRO笔试
题型:填空题

大中型水库移民后期扶持基金的目的是( )。

A.加大对大中型水库移民扶持力度

B.改善移民生产生活条件

C.促进库区和移民安置区经济社会发展

D.减少可再生能源的开发

E.保障能源安全

题型:填空题

阅读理解。

     Many cities in the world are benefiting from the night activities of a group of people who call

themselves guerrilla (游击队) gardeners. Armed with trowels, spades and a van full of flowers

and plants, guerrilla gardeners turn abandoned urban land into a blaze of color. In city centre

locations where there was mud, weeds and empty plastic bottles, residents often wake up to

find that the wasted area has been transformed overnight with brightly-colored bedding plants.

    In most British cities, local governments and police turn a blind eye to the effort of the gardeners,

whose activities are always carried out under cover of nightfall. And so far, there has been nothing

but praise from the astonished and delighted local residents when they find their neighborhood

transformed in such a striking fashion.

    Not only do the guerrilla gardeners beautify neglected places, they also return regularly to

water the plants and weed the flower beds. They also make sure that at least some of the plants

they bring are evergreens, which means that the area doesn't look depressing in the winter months.

    The first guerrilla gardener in London was Richard Reynolds, whose day job is at an advertising

agency. Mr. Reynolds, a graduate of Oxford University, began his efforts two years ago when he

moved to a flat in a tower block in South London. From his balcony, he could see several empty

concrete pots, placed by the local governments to contain plants but never used. He went out after

midnight and filled the pots with plants, and then planted more flowers in the path leading to the

entrance to the block.

    He then set up a website to explain his plan and called upon more gardeners to join him. Cash

donations flooded in and, more importantly, volunteers rushed to be part of the campaign. Within

six months, there were five hundred people in London prepared to come out at very short notice

to restore neglected parts of the urban landscape. There are now unofficial but carefully-organized

groups in many cities in Britain and North America and there is also a website where would-be

urban gardeners can find out the location of the next expedition.

1. These guerrilla gardeners do their work ______.

A. at the request of the government      

B. nearby their house

C. often in return for others' help  

D. out of their own free will

2. Richard Reynolds decided to fill the pots with plants in order to ______.

A. plant more flowers in the path

B. beautify the neighborhood

C. attract attention for his ad agency

D. make the plants a feast for his eyes

3. The guerrilla gardeners often return to their night working places with the purpose of ______.

A. looking after these plants

B. enjoying these beautiful flowers

C. helping plants live through winter months

D. changing the varieties of the plants

4. It can be inferred from the text that these guerrilla gardeners ______.

A. are mainly from the United Kingdom

B. will later get well paid

C. are still not accepted by the local government

D. become more and more organized

题型:填空题

下列关于复原重置成本和更新重置成本的描述,不正确的是()

A、两者反映的价格水平是一样的

B、两者反映的技术水平是一样的

C、两者反映的资产功能是一样的

D、应优先选择更新重置成本

题型:填空题

农网配电电力电缆单选题敷设长度不超过()m的电缆中间不应有接头。

A.250

B.300

C.350

D.500

题型:填空题

银河系的结构

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