单选题 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 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 cell in vital 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 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 arc 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 a result of radiation absorbed by its grandparents. It is not too careful to prevent from the radiation. Radiation can hurt us. We must know the truth.

单选题 According to the passage, the danger of nuclear power lies in ______.

【正确答案】 B

【答案解析】[解析] 细节题。利用定位关键词可以定位到第一段“Nuclear power"s danger to health, safety, and even life itself can be summed up in one word: radiation”，即“核能对人的健康、安全乃至生命本身所造成的危害可以用一个词来概括，那就是辐射”，原文中的be summed up in one word(用一个词概括)与题干中的lie in为同义改写，所以该题的答案为B。

单选题 Radiation can cause serious consequences even at the lowest level ______.

【正确答案】 D

【答案解析】[解析] 细节题。利用定位关键词可以定位到第二段“But even the lowest levels can do serious damage...But if the few cells are only damaged，and if they reproduce themselves, you may be in trouble...They can grow into cancer”，即“但是，即使是最低强度的核辐射也能构成严重的危害。……但是，如果很少的细胞只是受到了伤害，并且如果它们自己再生，你就会麻烦了。……它们可能就转变为癌症”，即受到伤害的细胞会再生出更多受到伤害的细胞，从而给人体带来危险，所以该题的正确答案为D。其中原文中的reproduce与选项中的duplicate为同义改写。这里迷惑性最大的是B选项，但是要特别注意unless的用法，unless (=if not)意为“除非，如果不”，容易引起歧义，建议在遇到unless时尽量将其转化为if not，从而避免理解错误。(but/however等转折结构经常为考查的重点所在)

单选题 The word "significant" in paragraph 2 most probably means ______.

【正确答案】 A

【答案解析】[解析] 猜词题。猜词题可以利用词根词缀法进行猜测，也可以用代入法进行判断。定位到该词所在的原句“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.”，即“但是即使是最低强度的核辐射也能构成严重的危害。……如果辐射没有伤害到任何重要的器官，那么所造成的损害可能就不______”，从语境可知significant与serious同义，而serious与选项中的fatal(严重的，致命性的)语义接近；也可以将四个选项分别代入进行判断，发现fatal比较符合语境，因而该题的正确答案为A。meaningful意为“有意义的”，remarkable意为“显著的，著名的”，harmful意为“有害的”。

单选题 Radiation can hurt us in the way that it can ______.

【正确答案】 D

【答案解析】[解析] 细节题。题干无明显定位关键词时，可以转为定位选项进行答题。利用选项A的关键词main organ可以定位到第二段“radiation Can kill an animal or human being outright by killing masses of cell in vital organs”，这里原文的“kill”与选项中的“cause to death”为同义，原文的“vital organ”与选项的“main organ”为同义改写，所以选项A与原文信息一致；利用选项B的关键词damage cells和cancer可以定位到第二段“But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble...They can grow into cancer”，可知选项B与原文信息一致；利用选项C的关键词offspring(后代，子孙)可以定位第三段“a child can be born weak or liable to serious illness as a result of radiation absorbed by its grandparents”，即“由于其祖父母受到辐射，一名小孩可能生来就体弱，或是容易患重病”，选项c与原文的信息一致。因而，该题的正确答案为D。

单选题 Which of the following can be best inferred from the passage?

【正确答案】 D

【答案解析】[解析] 推断题。利用选项A的关键词protection from radiation可以定位到第三段“It is not too careful to prevent from the radiation”，即“防止受到核辐射越小心越好”，因而选项A“保护不受到核辐射不能过分强调”与原文信息不符；利用选项B的定位关键词mystery可以定位到第一段“Nuclear radiation has a certain mystery about it, partly because it cannot be detected by human senses”(关于辐射，有某种神秘感，部分原因是人的感官感觉不到它)和第三段“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”(下面是有关核辐射的神秘性的另一个原因。在辐射造成损害时，受害者可能没有意识到)，可知核辐射的神秘性并非完全没有解决，所以B(核辐射的神秘性仍未解决)与原文信息不一致；利用选项C的关键词cancer可以定位到第二段“But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble...They can grow into cancer”，可知辐射可能导致癌症，但不能因此说癌症主要是辐射引起的，所以选项C与原文信息不符；利用选项D的定位关键词hurt和aware of可以定位到第三段“Serious damage can be done without the victim being aware at the time that damage has occurred”，所以选项D(辐射可以伤害那些没有意识到辐射的人)与原文信息一致。因而，该题的正确答案为D。