家庭作为社会的细胞，承担着多种多样的功能，主要有[ ] ①物质生产的功能 ②人口

2007年安徽省原副省长王怀忠因贪污受贿和巨额财产来源不明罪在济南被执行死刑，这说明[ ]

A．法律对全体成员具有普遍约束力

B．公民在法律面前一律平等

C．公民必须依法规范自己的行为

D．职位越高，功劳越大，法律的处罚就越重

阅读理解。

　　（1）我们是一列树，立在城市的飞尘里。

　　（2）许多朋友都说我们是不该站在这里的，这一点，其实我们知道得比谁都清楚。我们的家在山上，在不见天日的原始森林里。而我们居然站在这儿，站在这双线道的马路边，这无疑是一种堕落。我们的同伴都在吸露，都在玩凉凉的云。而我们呢？我们惟一的装饰，正如你所见的，是一身抖不落的烟尘。

　　（3）是的，我们的命运被安排定了，在这个充满车辆与烟囱的城市里，我们的存在只是一种悲凉的点缀。但你们尽可以节省下你们的同情心，因为，这种命运事实上是我们自己选择的，否则我们不必在春天勤生绿叶，不必在夏日献出浓阴。神圣的事业总是痛苦的，但是，也惟有这种痛苦能把深沉给予我们。

　　……

　　（4）立在城市的飞尘里，我们是一列忧愁而又快乐的树。

1．第三段中画横线的 “这种命运”指的是什么？

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2．第二段，写“我们的同类”有何作用？

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3．结合第三段内容说说行道树究竟为人类作了哪些贡献？

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4．最后一段“我们是一列忧愁又快乐的树”，忧愁什么？快乐什么？

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5．行道树代表一种什么样的精神？现实生活中有这样的人吗？试举一例。

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     Labor force is defined as being the total number of people who are available to work and earn

income. This definition includes everyone who is employed or seeking paid employment, so it includes

employers and the self-employed. Labor is one of the country's resources which can be combined with

other resources to produce the goods and services wanted by the community.

     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 (分布) 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 a balanced

spread age distribution. If the population naturally grows rapidly, the number of births greatly exceeds

(超出) the number of deaths then as a total population increases proportion of 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 insufficient numbers of young

people entering it to replace those who are leaving it. In that situation 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,

finance must be available for that purpose. If the size of the workforce is small relative to the total

population, then the government tax revenue (税收) is relatively low and either the government has less

money available to it or the workforce members have to be taxed more heavily.

1. In the passage "labor force" is defined as ___________.

A. people who are available to work and earn income

B. self-employed people only

C. people who are looking for an employment

D. employers who create job opportunities

2. The conclusion which can be drawn from the second paragraph is that___________. 

A. a natural growth of population leads to a balanced workforce

B. a large population does not necessarily mean a higher proportion of workforce

C. the larger the population, the higher the proportion of the workforce

D. the workforce will be lower, if the population has a balanced age distribution

3. When a population is said to be aging, ___________.

A. there are more people retiring than those entering the workforce

B. the birth rate must be growing

C. there should be an oversupply of workforce

D. There are more people entering the workforce than those retiring

细胞周期中，对各种刺激最为敏感的时期是（）

A.G0期

B.Gl期

C.G2期

D.S期

E.M期

搭设临边防护栏杆，当在基坑四周固定时，栏杆柱可采用钢管并打入地面（）。

A、40-60cm

B、45-65cm

C、50-70cm

D、55-75cm