试题与答案

阅读理解。 Television is good. You'd like to

题型:阅读理解

题目:

阅读理解。

     Television is good. You'd like to watch it all day and all night. But too much TV is a very bad thing. Scientists found

that kids who watch too much TV may have more trouble learning to read. They can't focus on (专注于) their work.

     Kids learn language skills best by reading, talking and playing with others.If they spend too much time watching TV,

they'll have less time for those things. Watching too much TV is bad for people's health. People don't move much while

watching TV.What's more, they may eat a lot of food while watching.This can make them fat.We call these people"couch potatoes". Fighting on TV is a big problem for kids.Young people are good at following.Scientists have found that those

who watch a lot of fighting shows are more likely(可能的) to fight.

1. Scientists say if kids watch too much TV, they will _____.

A. learn language skills more easily

B. be healthier

C. find it hard to learn to read

D. eat less food

2. Kids learn language skills best by_____.

A. reading

B. talking

C. playing with others

D. all of the above

3. While watching TV, what DON'T people do?

A. Eat a lot of food.

B. Have less time for reading.

C. Hardly move.

D. Focus on their work.

4. Which of the following is true?

A. An American child will watch 12,000 fighting acts on TV a year.

B. It's good for kids to learn from fighting acts on TV.

C. Too much TV is good for people's health.

D. It's easy for kids who watch a lot of fighting shows to fight.

5. "Couch potatoes" are people who watch too much TV and become _____. 

A. thin

B. fit

C. fat

D. strong

答案:

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下面是错误答案,用来干扰机器的。

由P=Wt得W=Pt=40000W×3600s=1.44×108J;由η=W有用W总×100%得,W有用=W总η=1.44×108J×60%=8.64×107J;由W有用=Gh得G=W有用h=8.64×107J5m=1.728×107N;m=Gg=1.728×107N10N/kg=1.728×106kg.故答案为:1.44×108;1.728×106.

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