Question

12．DNuclear power is the world's largest source of clean energy．Nuclear power plants（電廠） 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（福島） 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（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．

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．a(chǎn)ll 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 本文屬于說(shuō)明文閱讀，作者通過(guò)這篇文章主要向我們描述了核輻射對(duì)人體有許多危害，一定要妥善防護(hù)．

解答 32．D．細(xì)節(jié)理解題．根據(jù)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可知任何水平的輻射都會(huì)損害人體；故選D．
33．A．細(xì)節(jié)理解題．根據(jù)文章At very high levels，radiation can kill an animal or human being immediately by killing masses of cells in vital organs可知核輻射通過(guò)殺死重要器官的許多細(xì)胞殺死動(dòng)物；故選A．
34．D．細(xì)節(jié)理解題．根據(jù)文章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可知如果有人受到核輻射，他可能會(huì)患有癌癥，立即死亡，生出有弱癥的孩子；故選D．
35．B．推理判斷題．根據(jù)文章Nuclear radiation has a certain mystery about it，partly because it cannot be detected by human senses可知作者寫(xiě)這篇文章的主要目的是介紹輻射的奧秘；故選B．

點(diǎn)評(píng) 考察學(xué)生的細(xì)節(jié)理解和推理判斷能力，做細(xì)節(jié)理解題時(shí)一定要找到文章中的原句，和題干進(jìn)行比較，再做出正確的選擇．在做推理判斷題不要以個(gè)人的主觀想象代替文章的事實(shí)，要根據(jù)文章事實(shí)進(jìn)行合乎邏輯的推理判斷．