科学家们证实,这种化学物质具有很强的水溶性,对土壤几乎没有亲和力,同时它又是很难分解

题型:单项选择题

问题:

科学家们证实,这种化学物质具有很强的水溶性,对土壤几乎没有亲和力,同时它又是很难分解的寿命很长的物质。______甲基叔丁基乙醚见光可分解,______阳光很难进入土壤和地下水中。______,它一旦进入地下水中,人们就很难将它“请”出来, ______它渗入到更深水层的可能性则是不可避免的了。 填入划横线部分最恰当的一项是( )。

A.因为 所以 然而 最后

B.虽说 但是 所以 最终

C.由于 故而 但是 而

D.虽说 但是 因此 而

考点:国家公务员行政职业能力测试行政职业能力测试
题型:单项选择题

大黄附子汤的组成药物中含有

A.人参干姜
B.厚朴枳实
C.甘遂
D.细辛

题型:单项选择题

阅读理解

     I'm usually fairly skeptical about any research that concludes that people are either happier or unhappier or more or less certain of themselves than they were 50 years ago. While any of these statements might be true, they are practically impossible to prove scientifically. Still, I was struck by a report which concluded

that today's children are significantly more anxious than children in the 1950s. In fact, the analysis showed, normal children aged 9 to 17 exhibit a higher level of anxiety today than children who were treated for

mental illness 50 years ago.

     Why are America's kids so stressed? The report cites two main causes: increasing physical isolation

(隔离) brought on by high divorce rates and less involvement in community, among other things and a

growing perception that the world is a more dangerous place.

     Considering that we_can't_turn_the_clock_back,_adults can still do plenty to help the next generation.

     At the top of the list is nurturing(培育) a better appreciation of the limits of individualism. No child is an island. Strengthening social ties helps build communities and protect individuals against stress.

     To help kids build stronger connections with others, you can pull the plug on TVs and computers. Your family will thank you later. They will have more time for facetoface relationships, and they will get more

sleep.

     Limit the amount of virtual(虚拟的) violence your children are exposed to. It's not just video games and movies; children see a lot of murder and crime on the local news.

     Keep your expectations for your children reasonable. Many highly successful people never attended

Harvard or Yale.

     Make exercise part of your daily routine. It will help you cope with your own anxieties and provide a

good model for your kids. Sometimes anxiety is unavoidable. But it doesn't have to ruin your life.

1. According to the analysis, compared with normal children today, children treated as mentally ill 50 years ago ________.

A. probably suffered less from anxiety

B. were considered less individualistic

C. were less isolated physically

D. were probably less selfcentered

2. What does the author mean by saying "we can't turn the clock back" in the third paragraph?

A. It's impossible to forget the past.

B. The social reality children are facing cannot be forgotten.

C. It's impossible to slow down the pace of change.

D. Lessons learned from the past should not be forgotten.

3. The author thinks that the conclusions of any research about people's state of mind are ________.

A. illogical  

B. confusing

C. surprising  

D. questionable

4. Which of the following statements is TRUE according to the passage?

A. To children, anxiety is completely avoidable.

B. TV and computer play an important role in isolating children from the real world.

C. Exercise does not help to lessen children's anxiety.

D. Sometimes local news about crime and murder also affects children a little.

5. The first and most important thing parents should do to help their children is________.

A. to lower their expectations for them

B. to set a good model for them to follow

C. to get them more involved socially

D. to improve them with a safer environment

题型:单项选择题

明配电线管的弯曲半径不应小于管外径的()倍。

A.4

B.6

C.8

D.10

题型:单项选择题

使用划针划线时,划针尖要紧贴导向工具,上端向外倾斜15°~20°,向划线方向倾斜约()。

A.45°~70°

B.70°~80°

C.80°~90°

D.90°~120°

题型:单项选择题

全国统一的社会保障制度的初创阶段是( )。

A.1950~1956年
B.1949~1958年
C.1951~1957年
D.1950~1957年

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