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Nuclear power's(核能的) danger to health, s...

Nuclear power's(核能的) danger to health, safety, and even life itself can be described in one word: radiation(辐射).

Nuclear radiation has a certain mystery about it, partly because it cannot be detected (探测) by human senses. It can't be seen or heard, or touched or tasted, even though it may be all around us. There are other things like that. For example, radio waves are all around us but we can't detect them, sense them, without a radio receiver. Similarly, we can't sense radioactivity without a radiation detector. But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things.

At very high levels, radiation can kill an animal or human being outright by killing masses of cells (细胞) in important organs (器官). But even the lowest levels can do serious damage. There is no level of radiation that is completely safe. If the radiation does not hit anything important, the damage may not be significant. This is the case when only a few cells are hit, and if they are killed outright. Your body will replace the dead cells with healthy ones. But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble. They reproduce themselves in an unusual way. They can grow into cancer. Sometimes this does not show up for many years.

This is another reason for some of the mystery about nuclear radiation. Serious damage can be done without the knowledge of the person at the time that damage has occurred. A person can be irradiated(放射治疗) and feel fine, then die of cancer five, ten, or twenty years later as a result. Or a child can be born weak or easy to get serious illness as a result of radiation absorbed by its grandparents.

Radiation can hurt us. We must know the truth.

1.According to the passage, the danger of nuclear power lies in ________.

A. nuclear mysteryB. radiation detection

C. radiation levelD. nuclear radiation

2.Radiation can lead to serious results even at the lowest level ________.

A. when it kills few cells

B. if it damages few cells

C. though the damaged cells can repair themselves

D. unless the damaged cells can reproduce themselves

3.Radiation can hurt us in the way that it can ________.

A. kill large numbers of cells in main organs so as to cause death immediately

B. damage cells which may grow into cancer years later

C. affect the healthy growth of our younger generation

D. lead to all of the above results

4.Which of the following can be best inferred from the passage?

A. The importance of protection from radiation cannot be overemphasized (过分强调).

B. The mystery about radiation remains unsolved.

C. Cancer is mainly caused by radiation.

D. Radiation can hurt those who do not know about its danger.

 

1.D 2.B 3.D 4.A 【解析】 试题分析:文章介绍核辐射对人类和动物的危害,即便辐射较弱,也会危害健康,有的影响不是明显的,但是人们可能多年后会死于癌症,或会对后代产生影响,如果核辐射量大,会导致死亡。 1.D 细节理解题。根据第一段提到Nuclear power's(核能的) danger to health, safety, and even life itself can be described in one word: radiation(辐射).可知,它的危险在于辐射,故选D项。 2.B 细节理解题。根据第三段提到There is no level of radiation that is completely safe. (任何程度的辐射是完全安全的)以及But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble. They reproduce themselves in an unusual way. They can grow into cancer. Sometimes this does not show up for many years.可知,即便是低程度的辐射,如果受损害的细胞可以复制自己,这样复制出来的细胞也是受损害的,这最后会成为癌症,故选B项。 3.D 细节理解题。根据第三段提到At very high levels, radiation can kill an animal or human being outright by killing masses of cells (细胞) in important organs (器官).可知会伤到器官,再They reproduce themselves in an unusual way. They can grow into cancer可知会导致癌症,再根据第四段提到Or a child can be born weak or easy to get serious illness as a result of radiation absorbed by its grandparents影响孩子的生长,故选D项。 4.A 推理判断题。根据第二段Nuclear radiation has a certain mystery about it, partly because it cannot be detected (探测) by human senses可知,辐射在某种程度仍然是个秘密,故B错;根据第三段可知辐射会导致癌症但并不是所有人的癌症都由辐射引起,故C错;辐射是任何人都伤害,不是伤害它不知道的人,故D错;根据倒数第二段提到“让我们了解辐射的危害”,故选A项。 考点:考查科普类阅读
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In some ways, the United States has made some progress. Fires no longer destroy 18,000 buildings as they did in the Great Chicago Fire of 1871, or kill half a town of 2,400 people, as they did the same night in Peshtigo, Wisconsin. Other than the Beverly Hill Supper Club fire in Kentucky in 1977, it has been four decades since more than 100 Americans died in a fire.

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Experts say the error is an opinion that fires are not really anyone's fault. That is not so in other countries, where both public education and the law treat fires as either a personal failing or a crime. Japan has many wood houses; of the 48 fires in world history that burned more than 10,000 buildings, Japan has had 27. Punishment for causing a big fire can be as severe as life imprisonment.

In the United States, most education dollars are spent in elementary schools. But, the lessons are aimed at too limited a number of people; just 9 percent of all fire deaths are caused by children playing with matches.

The United States continues to depend more on technology than laws or social pressure. There are smoke detectors in 85 percent of all homes. Some local building laws now require home sprinklers (喷水装置). New heaters and irons shut themselves off if they are tipped.

1.The reason why so many Americans die in fires is that _____.

A. they took no interest in new technology

B. they did not pay great attention to preventing fires

C. they showed indifference to fighting fires

D. they did not spend enough money on fire equipment

2.It can be inferred from the passage that ______.

A. fire safety lessons should not be aimed only at American children

B. American children have not received enough education of fire safety lessons

C. Japan is better equipped with fire equipment than the United States

D. America's large population leads to more fires

3.Which of the following statements is true according to the passage?

A. There has been no great fire in the USA in recent 40 years that leads to high death rate.

B. There have been several great fires in the USA in recent 40 years that lead to high death rate.

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