视野是指人眼能观察到的范围,其中在头部固定,而转动眼球注视某一中心点时所见的范围成为

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问题:

视野是指人眼能观察到的范围,其中在头部固定,而转动眼球注视某一中心点时所见的范围成为( )。

A.注视野

B.动视野

C.静视野

D.视平面

考点:安全工程师安全生产技术安全生产技术
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欧·亨利(1862—1910年)是美国著名的短篇小说作家,他善于描写小人物的不幸命运,揭示资本主义的不平等与虚伪。在艺术上,他的小说常常以“带泪的微笑”和辛酸的欢乐打动读者,善于构思一个出人意料的结局,这种写法称为“欧·亨利笔法”。据此判断,“欧·亨利笔法”应该属于 [ ]

A.现实主义

B.浪漫主义

C.印象主义

D.现代主义

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(10分)阅读下列材料,回答问题。

材料一 长江三角洲以全国2.2%的陆地面积,创造了全国22.1%的国内生产总值。长江三角洲地区是我国经济社会发展和工业化、城市化、现代化水平最高的区域。

材料二 为促进上海海洋运输发展,上海跳出长江口,在距上海浦东南汇芦湖港约30千米的大小洋山建设深水港。

小题1:简述长江三角洲城市带形成的自然原因。(2分)

小题2:简述上海在洋山建设新港的主要区位优势及其对上海发展的主要作用。(4分)

小题3:崇明岛在上海城市规划中被定位为生态岛区,你认为其适合发展哪些产业?(1分)

小题4:十—·五规划提出推进主体功能区建设,协调区域发展,将国土空间划分为优化开发、重点开发、限制开发、禁止开发四类区域。长江三角洲被列为优化开发区,请你简要说明其经济发展方向。(3分)

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高炉冶炼加熔剂的目的是调整炉渣碱度,降低矿石中脉石熔点及脱硫。

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厚朴采用的净制方法是()

A.去残茎

B.去皮壳

C.去心

D.去芦

E.去核

题型:单项选择题

Workforce is defined as the total number of people who are available to work and earn incomes. The definition includes everyone who is employed or seeking paid employment, so it includes employers and the self-employed.

Although the size of the workforce depends a great deal on the size of the total population, there are several other influences which also affect it. The age distribution of the total population has a very marked effect on the available workforce. If the population has a high proportion of very young people or of those too old to work, then the available workforce would be lower than if there were an evenly spread age distribution. If the population grows rapidly from natural increase, i.e., the number of births greatly exceeds the number of deaths, then as the total population increases, the proportion in the workforce declines

Sometimes a population is described as aging, which means that the birth rate is either falling or growing very slowly, and as people retire from the workforce, there are not enough young people entering it to replace those who are leaving it. The population is top-heavy with older people. So the percentage of the population in the workforce declines when there is either a rapid increase in births or a falling birth rate.

The age distribution of the population has several important effects on the economy. If the population is aging and there is an increase in the number of people retiring without a corresponding increase in the number entering the workforce, this raises the problem of the ability of the economy to provide a reasonable level of social services to the retired group. If the aged are to be cared for in special homes or hotels, finances must be available for that purpose. If the size of the workforce is small relative to the total population, then the government tax receipts are relatively low and either the government has less money available to it or the workforce members have to be taxed more heavily.

The factor that does not influence the size of the workforce is ().

A. the size of the total population

B. the age distribution of a population

C. the national economy

D. the natural population growth

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