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 about it, partly because 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 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 immediately by killing masses of cells in vital organs. But even the lowest levels can do serious damage. There is no levels 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(輻射)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.Which of the following statements is true?

A．Nuclear radiation is just like common radio waves.

B．Nuclear radiation can cause cancer to human beings.

C．Nuclear radiation can be detected by human senses.

D．Nuclear radiation can be safe to human beings if its level is low.

2.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.

3.If a human being is hit by nuclear radiation, he may __________.

A．die of cancer after many years

B．die immediately

C．have a child who may be born weak

D．all of the above

 

Answer 1

1.B

2.D

3.D

【解析】

文章大意：本文向我們介紹了核能對我們健康的危害。核能對人類的健康、安全乃至生命所造成的危害可用一個單詞加以概括：輻射。

1.B　細節(jié)理解題。由第二段第一句話可知，C項錯誤；由第二段最后一句話“But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things. ”可知，核輻射對人類健康有害，它和一般的微波不一樣，所以A、D項錯誤；由第三段倒數(shù)第二句話可知，B項正確。

2.2】D　推理判斷題。由第三段第一句話“At very high levels, radiation can kill an animal or human being immediately by killing masses of cells in vital organs.”可知，D項正確。

3.3】D　細節(jié)理解題。由第四段倒數(shù)后兩句話可知，A、C項正確；由第三段第一句話可知，A項正確。所以選D項。