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  3. Nuclear Power and Its Danger Nuclear power’s danger to health, safety, and even life itself can be summed up in one word;rad

Nuclear Power and Its Danger Nuclear power’s danger to health, safety, and even life itself can be summed up in one word;rad

admin2013-12-20  70
问题                         Nuclear Power and Its Danger
    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 outright by killing masses of cells in vital organs. But even the lowest level of radiation 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 a deformed 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 victim being aware at the time that damage has occurred. A person can be irradiated and feel fine, then die of cancer five, ten, or twenty years later as a result. Or a child can be born weak or liable to serious illness as result of radiation absorbed by its grandparents. Radiation can hurt us. We must know the truth.
Which of the following can be best inferred from the passage?
选项 A、The importance of protection from radiation cannot be over-emphasized.
B、The mystery about radiation remains unsolved.
C、Cancer is mainly caused by radiation.
D、Radiation can hurt those who are not aware of its danger.
答案A
解析 题干的意思是能从文章中推断出的最恰当的陈述是：A．预防核辐射的重要性再强调也不过分；B．辐射的秘密还没有揭开；C．癌症主要是由辐射引起的；D．辐射可能伤害那些意识不到辐射危害的人。从文章内容和常识判断，A为正确答案。
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