题目内容

We’ve heard about radiation from the damaged nuclear reactors in Japan reaching American shores. Experts say so far there is no reason to worry, and point out that we meet radiation every day. Where and how? NPR’s Renee Montagne posed that question to Peter Caracappa, a radiation safety officer and professor of nuclear engineering.

MONTAGNE: How many things emit radiation?

Dr CARACAPPA: Well, radiation and radioactive material is a part of nature. So everything that’s living has some amount of radiation coming from it—a very small amout. Plus there’s radiation in the ground and the air.

So the extremes are uranium in the soil to bananas?

Yes.

By the way, why do bananas have radiation?

Bananas have a lot of potassium(钾). And a small amount of potassium naturally is called potassium 40, which is radioactive

What’s the difference between radiation that’s harmful and not harmful?

Well, the term radiation can apply to a lot of different things. But the harmful radiation is ionizing(离子)radiation. It has enough energy that it can make chemical changes in material. We could get ionizing radiation from an X-ray, for example. It’s the kind of radiation that causes cancer.

The broader definition of radiation includes a lot of things that we call non-ionizing radiation. That includes everything like radio waves and visible light and your microwave.

So what then is the largest contributor of ionizing radiation?

For the natural sources of ionizing radiation, actually the biggest chunk of that tends to come from radon(氡), which is a radioactive material that is present in the air. It can become a concern when it builds up in low-lying areas of homes like basements.

Would it be fair to say that most people do not need to worry about the danger of being exposed to radiation?

I would say that the everyday exposure to radioation that we meet contributes an extremely tiny risk to our life or to our health compared to all of the other risks that we meet in our day-to-day life.

1.We can infer from the first paragraph that radiation is______.

A.rare

B.powerful

C.dangerous

D.common

2.The passage may be _______.

A.an interview

B.an argument

C.a talk show program

D.a science report

3.Whether radiation is harmful or not depends on______.

A.whether it has a small amount of potassium

B.whether it changes chemical in materials.

C.whether it has energy to change materials

D.whether it is visible in life

4.The purpose of writing this passage is to _______.

A.advise on how to protect us from radiation

B.analyze what causes radiation in daily life

C.warn people of the danger of radiation

D.expect people not to fear everyday radiation

 

【答案】

1.D

2.A

3.B

4.D          

【解析】

试题分析:文章通过一次采访报道介绍了放射性的辐射是很普遍的现象,人们没有必要过于担心。

1.D 推理题。根据第一段第二行Experts say so far there is no reason to worry, and point out that we meet radiation every day.说明在我们的生活中放射性是很常见的事情,故D正确。

2.A 推理题。根据第一段最后两行NPR’s Renee Montagne posed that question to Peter Caracappa, a radiation safety officer and professor of nuclear engineering.说明Montagne在采访一名核方面的教授,故这是一次采访活动,A正确。

3.B 推理题。根据倒数第六段But the harmful radiation is ionizing(离子)radiation. It has enough energy that it can make chemical changes in material.说明当这样的离子有足够的能量产生化学反应的时候,就对人体有害了,故B正确。

4.D 主旨大意题。根据文章的主题段第一段可知在日常生活中放射性随处可见,是一种很普遍的现象,人们没有必要过去担心。故D正确。

考点:考查科普类短文阅读

点评:科普类短文是考生感觉难度较大的短文,因为文章中的生词较多,理解起来有一定的难度,在阅读时要培养猜测词义的能力和推理能力。

 

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  Many people say, “I am much younger than my mother— or my father— was at my age. ”No one says“Act your age” any more. We’ve stopped looking with surprise at older people who act in youthful ways.

It can be learnt from the text that the aging of the population in America ________ .

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  B. has changed people’s social position

  C. has changed people’s understanding of age

  D. has slowed down the country’s social development

The underlined word “one” refers to ________ .

  A. a society           B. America

  C. a place            D. population

“Act your age” means people should ________ .

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  C. show respect for their parents young or old

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If a 25 - year - old man becomes general manager of a big firm, the writer of the text would most probably consider it ________ .

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【小题1】..
A.calmly 
B.quickly
C.angrily
D.carefully
【小题2】.
A.get up  
B.get away
C.get down  
D.get along
【小题3】.
A.similar  
B.terrible
C.rude    
D.familiar
【小题4】.
A.first
B.farthest
C.last
D.nearest
【小题5】.
A.suggested
B.complained
C.thought
D.concluded
【小题6】.
A.Always
B.Just
C.Almost
D.Still
【小题7】.
A.impression
B.grades
C.skill
D.news
【小题8】.
A.lessons
B.purposes
C.possibilities
D.reasons
【小题9】.
A.used
B.needed
C.preferred
D.reminded
【小题10】.
A.decide
B.drive
C.react
D.do
【小题11】.
A.problem
B.threat
C.mess
D.result
【小题12】.
A.happened to
B.came across
C.passed by
D.flashed through
【小题13】.
A.accidents
B.incidents
C.affairs
D.quarrels
【小题14】.
A.noticed
B.given
C.taught
D.passed
【小题15】.
A.degree
B.measure
C.step
D.action
【小题16】.
A.as soon as
B.in case
C.as though
D.even though
【小题17】.
A.get
B.set
C.make
D.catch
【小题18】.
A.question
B.wonder
C.forget
D.know
【小题19】..
A.troublesome
B.polite
C.rude
D.warm
【小题20】.
A.casual
B.dangerous
C.amazing
D.cautious

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1.A. time   B. effort    C. change          D. reward

2.A. satisfaction         B. guilt       C. anger    D. pleasure

3.A. lecture      B. report   C. study     D. tour

4.A. crying         B. begging          C. singing  D. dancing

5.A. passengers         B. customers     C. tourists D. foreigners

6.A. ignoring     B. serving C. observing      D. following

7.A. against        B. for         C. with       D. in

8.A. frightening          B. touching        C. fascinating     D. interesting

9.A. peaceful    B. noisy     C. wealthy          D. primitive

10.A. glanced    B. laughed         C. shouted         D. stared

11.A. unless      B. so C. but                   D. or

12.A. looking around         B. stepping forward  C. getting about         D. breaking in

13.A. secretly   B. carelessly      C. deliberately  D. eagerly

14.A. since        B. before  C. after      D. as

15.A. showing   B. showed          C. pointing         D. pointed

16.A. stopped   B. valued  C. made    D. repeated

17.A. moved     B. replied C. worked D. carried

18.A. done        B. was done       C. has been done      D. had been done

19.A. cancelled          B. continued     C. started  D. delayed

20.A. funny       B. smart    C. simple     D. modest

 

America is growing older. Fifty - eight years ago, only 4 out of every 100 people in the United States were 65 or older. To day, 10 out of every 100 Americans are over 65. The aging of the population will affect(影响)American society in many ways—education, medicine, and business. Quietly, the graying of America has made us a very different society—one in which people have a quite different idea of what kind of behavior(行为) is suitable(合适)at various , ages.

  A person s age no longer tells you anything about his/her social position, marriage or health. There’s no longer a particular year in which one goes to school or goes to work or gets married or starts a family. The social clock that kept us on time and told us when to go to school, get a job, or stop working isn’t as strong as it used to be. It doesn’t surprise us to hear of a 29 - year - old university president or a 35 - year -old grandmother, or a 70 year - old man who has become a father for the first time. Public ideas are changing.

  Many people say, “I am much younger than my mother— or my father— was at my age. ”No one says“Act your age” any more. We’ve stopped looking with surprise at older people who act in youthful ways.

1.It can be learnt from the text that the aging of the population in America ________ .

A.has made people feel younger

B.has changed people’s social position

C.has changed people’s understanding of age

D.has slowed down the country’s social development

2.The underlined word “one” refers to ________ .

A.a society

B.America

C.a place

D.population

3.“Act your age” means people should ________ .

A.be active when they are old

B.do the right thing at the right age

C.show respect for their parents young or old

D.take more physical exercise suitable to their age

4.If a 25 - year - old man becomes general manager of a big firm, the writer of the text would most probably consider it ________ .

A.normal

B.wonderful

C.unbelievable

D.unreasonable

 

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