试题与答案

下列哪些是引起慢性肺心病肺动脉高压的因素A.儿茶酚胺分泌增多 B.水、钠潴留使血容量

题型:单项选择题

题目:

下列哪些是引起慢性肺心病肺动脉高压的因素

A.儿茶酚胺分泌增多

B.水、钠潴留使血容量增多

C.肺泡毛细血管床减少

D.红细胞增多

答案:

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1.引出说明对象,形象地说明堰塞湖的形成过程及危害(引起读者的阅读兴趣)。2.第②段举例在于说明堰塞湖形成的原因和类型,第③段举例在于说明“稳定的堰塞湖对人类一般不会构成威胁”,同时引出下 文,说...

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题型:阅读理解

阅读理解

    Researches have suggested that your gameplaying habits and TV watching inspire you to act out, but

those who enjoy killing people on screen disagree with the result.  "I have played the most violent games

available on the market today, "writes Mateo,   15.  "I don't go killing people or stealing cars because I

see it in a game.  My parents say that,   as long as I remember it's a game,   I can play whatever I want. "

      Despite what they say,   many scientific studies clearly show that violent video games make kids more

likely to yell,   push,   and punch,   says Brad Bushman,   a psychologist at the University of Michigan in

Ann Arbor.  Bushman and his colleagues recently reviewed more than 300 studies of video media effects

and said,   " We included every single study we could find on the topic.  Regardless of what kids say,  

violent video games are harmful. "

      TV has been around a lot longer than video games,   so researchers have more data on the longterm

effects of violent TV shows on people than they do on the effects of violent video games.  Scientists at

the University of Michigan recorded the TVwatching habits of hundreds of first and third graders in

1977.  Fifteen years later,   the researchers looked at what kind of adults these kids had become.  By

the time they were in their early twenties,   women who had watched violent shows as kids were four

times as likely to have punched,   choked,   or beaten other people as were women who didn't watch

such programs as kids.  Boys who watched violent TV grew up to be three times as likely to commit

crimes as boys who didn't watch such programs.  But that doesn't mean that everyone who watched

violent programs ended up being violent themselves.  It was just more likely to happen for some people.  

1.  Which of the following about Mateo is TRUE?

A. He doesn't go killing people or stealing cars in a game.  

B. He works in a market.  

C. His parents allow him to play violent games as long as he regards it as a game.  

D. He agrees that gameplaying habits and TV watching inspire one to act out.  

2.  Researches show ________.  

A. violent TV shows have more bad effects on people than violent video games

B. women are more likely to punch,   choke or beat other people

C. boys who watched violent programs ended up being violent themselves

D. both violent TV shows and violent video games are harmful

3.  According to the passage,   we students________.  

A. had better watch violent TV shows than play violent games

B. should try to control our behaviors after playing violent games

C. should give up the habits of watching violent shows and playing violent games

D. should keep away from those watching violent programs in case they commit crimes

4.  From the passage,   we can infer that________.  

A. everyone who watched violent programs ended up being violent themselves

B. Brad Bushman is against violent video games

C. government has taken measures to stop violent shows and games

D. TV has been around a lot longer than video games

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