Question

Nuclear power's danger to health, safety, and even life itself can be summed up in one word: radiation.

Nuclear radiation has a certain mystery, partly be?cause it cannot be detected 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 de?tect them, sense them, without a radio receiver. Simi?larly, 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 immediately by killing masses of cells in vi?tal organs. 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 serious. This is the case when only a few cells are hit, and if they are killed immediately, 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 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 victim being aware at the time that damage has occurred. A person can be irradiated (辐射)and feel fine, then die for cancer five, ten, or twenty years later as a result. Or a child can be born weak 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 the     .

A.    nuclear mystery

B.    nuclear radiation

C.    radiation level

D.    radiation detection

2.Which of the following statements is TRUE of nu?clear radiation?

A.    It can do harm to human beings.

B.    It can be detected by human senses.

C.    It is just like common radio waves.

D.    It cannot do harm to human beings.

3.How can nuclear radiation kill an animal?

A.    By damaging its heart.

B.    By killing a few cells.

C.    By hitting any place in its body.

D.    By killing many cells in important organs.

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

A.    Cancer is mainly caused by radiation.

B.    The mystery about radiation remains unsolved.

C.    Radiation can hurt those who are not aware of its danger.

D.    The importance of protection from radiation can not be overemphasized.

Answer 1

【文章大意】本文介绍了核辐射的危害性。核辐射是神秘的，虽然我们感觉不到，但其危害巨大。

B 细节理解题。根据文章第一段"Nuclear power's clanger to health, safety, and even life itself can be summed up in one word: radiation."可知答案为B。

A细节理解题。根据文章第二段最后一句"But unlike com?mon radio waves, nuclear radiation is not harmless to human beings and other living things."可知答案为A。

D细节理解题。根据第三段第一句"At very high levels, ra-diation can kill an animal or human being immediately by kill?ing masses of cells in vital organs."可知答案为D。

D推理判断题。根据文章的最后两句话"Radiation can hurt us. We must know the truth."可以推断，人们防范核辐射的意识越强越好。故答案为D。

[拓展延伸] 佳句赏析

Serious damage can be done without the victim being aware at the time that damage has occurred.

分析：the time是先行词，被定语从句"that damage has occurred" 修饰。

句意：在受害者没有意识到核辐射危害发生时，其危害已经造成了。