Question

12．DNuclear power is the world's largest source of clean energy．Nuclear power plants（电厂） produce no controlled air pollutants，such as sulfur or greenhouse gases．The use of nuclear power in place of other energy sources helps to keep the air clean，preserve the earth's climate，and prevent acid rain．Howeve r，there exist safety concerns if the plant is not operated correctly or unforeseen things happened when the plant was developed，as happened at the Fukishima（福岛） plant in Japan．It may cause damage to everything，including our health．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 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（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．

32．What can we infer from the passage？D
A．We can't detect radioactivity even with modern equipment．
B．Only radiation at very high levels can kill an animal or human being．
C．If a few cells are only damaged，healthy cells will take the place of dead ones．
D．Radiation is harmful no matter what level it is．
33．How can nuclear radiation kill an animal？A
A．By killing many cells in important organs．
B．By killing a few cells．
C．By hitting any place in its body．
D．By damaging its heart．
34．If a human being is hit by nuclear radiation，he mayD
A．die of cancer after many years                        
B．die immediately  
C．have a child who may be born weak                   
D．all of the above
35．What's the author's main purpose in writing this passage？B
A．Discussing the cause of cancer．
B．Solving the mystery about radiation．
C．Emphasizing the importance of protection from radiation．
D．Introducing the nuclear power．

Answer 1

分析 本文属于说明文阅读，作者通过这篇文章主要向我们描述了核辐射对人体有许多危害，一定要妥善防护．

解答 32．D．细节理解题．根据文章There is no levels of radiation that is completely safe．If the radiation does not hit anything important，the damage may not be serious可知任何水平的辐射都会损害人体；故选D．
33．A．细节理解题．根据文章At very high levels，radiation can kill an animal or human being immediately by killing masses of cells in vital organs可知核辐射通过杀死重要器官的许多细胞杀死动物；故选A．
34．D．细节理解题．根据文章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可知如果有人受到核辐射，他可能会患有癌症，立即死亡，生出有弱症的孩子；故选D．
35．B．推理判断题．根据文章Nuclear radiation has a certain mystery about it，partly because it cannot be detected by human senses可知作者写这篇文章的主要目的是介绍辐射的奥秘；故选B．

点评 考察学生的细节理解和推理判断能力，做细节理解题时一定要找到文章中的原句，和题干进行比较，再做出正确的选择．在做推理判断题不要以个人的主观想象代替文章的事实，要根据文章事实进行合乎逻辑的推理判断．