某市管道煤气收费标准如下:每月每户30m3以内(含30m3)收2.5元/m3,超

题型:填空题

问题:

某市管道煤气收费标准如下:每月每户30m3以内(含30m3)收2.5元/m3,超过部分收4元/m.则某月小张家用煤气20m3,该付费______元,而小李家用煤气35m3,则该付费______元.

考点:有理数的混合运算
题型:填空题

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I'm usually fairly doubtful 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? According to the report there are two main causes: increasing loneliness ─ brought on by high divorce rates and little communication with society, among other things ─ and a growing perception that the world is a more dangerous place.

Given that we can't turn the clock back, adults can still do plenty to help the next generation handle such difficulties. At the top of the list is giving children a better appreciation of the limits of individualism (个人主义). No child is an island. Strengthening social ties helps 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 face-to-face relationships, and they will get more sleep.

Limit the amount of virtual  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 deal 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. The author thinks that the conclusions of any research comparing people's state of mind today with people’s state of mind in the past are______.

A. surprising   B. confusing      C. interesting        D. questionable

2. What does the author mean when he says, “we can't turn the clock back” (Paragraph 3)?

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

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

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

D. It's impossible to forget the past.

3. According to the analysis, compared with normal children today, children treated as mentally ill 50 years ago____.

A. had little communication with friends 

B. were probably less self-centered  

C. probably suffered less from anxiety

D. were considered less individualistic

4. The first and most important thing parents should do to help their children is ____.

A. to provide the children with a safer environment

B. to lower their expectations for the children

C. to get the children more active socially

D. to set an example for the children to follow

5. What conclusion can be drawn from the passage?

A. Anxiety, though unavoidable, can be dealt with.

B. Children's anxiety has been taken too seriously.

C. Children's anxiety can disappear with more parental care.

D. Anxiety, if properly controlled, may help children become mature.

题型:填空题

生产经营单位应当安排用于配备劳动防护用品、进破全生产培训的()。

A.经费 

B.规划 

C.布置 

D.计划

题型:填空题

数据库系统与文件系统的主要区别是

A.数据库系统复杂,而文件系统简单

B.文件系统不能解决数据冗余和数据独立性问题,而数据库系统可以解决

C.文件系统只能管理程序文件,而数据库系统能够管理各种类型的文件

D.文件系统管理的数据量较少,而数据库系统可以管理庞大的数据量

题型:填空题

移动式配电箱、开关箱中心点与地面的相对高度可为( )。

A.0.3m

B.0.6m

C.0.9m

D.1.8m

题型:填空题

二十八初孕妇,孕33周,自觉乏力、食欲差,伴恶心、呕吐2周,小便深黄色,皮肤瘙痒5日。查体:体温37.5℃,血压130/90mmHg,神志清,皮肤巩膜黄染,躯干及四肢皮肤可见散在出血点,肝肋下未触及,胎头入盆,胎心140次/分。

若ALT542U/L,总胆红素85.5μmol/L,结合胆红素46μmol/L,尿胆红素(+),HBsAg(+),本例最可能的诊断是()

A.妊娠高血压疾病引起的肝损害

B.妊娠剧吐

C.妊娠急性脂肪肝

D.妊娠合并病毒性肝炎

E.妊娠肝内胆汁淤积症

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