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1、课时跟踪练(一)Introduction&Reading—PrereadingⅠ.阅读理解ANuclearpower’sdangertohealth,safety,andevenlifeitselfcanbesummedupinoneword:radiation.Nuclearradiationhasacertainmysteryaboutit,partlybecauseitcannotbedetectedbyhumansenses.Itcan’tbeseenorheard,ortouchedortasted,eve
2、nthoughitmaybeallaroundus.Thereareotherthingslikethat.Forexample,radiowavesareallaroundusbutwecan’tdetectthem,sensethem,withoutaradioreceiver.Similarly,wecan’tsenseradioactivitywithoutaradiationdetector.Butunlikecommonradiowaves,nuclearradiationisnotharmlesstoh
3、umanbeingsandotherlivingthings.Atveryhighlevels,radiationcankillananimalorhumanbeingimmediatelybykillingmassesofcellsinvitalorgans.Buteventhelowestlevelscandoseriousdamage.Thereisnolevelsofradiationthatiscompletelysafe.Iftheradiationdoesnothitanythingimportant,
4、thedamagemaynotbeserious.Thisisthecasewhenonlyafewcellsarehit,andiftheyarekilledimmediately,yourbodywillreplacethedeadcellswithhealthyones.Butifthefewcellsareonlydamaged,andiftheyreproducethemselves,youmaybeintrouble.Theycangrowintocancer.Sometimesthisdoesnotsh
5、owupformanyyears.Thisisanotherreasonforsomeofthemysteryaboutnuclearradiation.Seriousdamagecanbedonewithoutthevictimbeingawareatthetimethatdamagehasoccurred.Apersoncanbeirradiated(辐射)andfeelfine,thendieforcancerfive,ten,ortwentyyearslaterasaresult.Orachildcanbeb
6、ornweakasaresultofradiationabsorbedbyitsgrandparents.Radiationcanhurtus.Wemustknowthetruth.语篇解读:文章介绍了核辐射对人造成的危害是巨大的,它可以立即杀死一个人,也可能会潜伏多年再发生癌变,甚至可能遗传给后代。1.Whatisthemainideaofthepassage?A.Howtodetectnuclearradiation.B.Howradiationkillsaman.C.Themysteryaboutnuclear
7、radiation.D.Seriousdamagecausedbynuclearradiation.非常感谢上级领导对我的信任,这次安排我向股份公司述职,既是对我履行职责的监督,也是对我个人的关心和爱护,更是对**百联东方商厦有限公司工作的高度重视和支持。解析:选C 主旨大意题。根据第一、二段可知,核能的危害可以归结为辐射,核辐射有一种神秘感,主要是因为它不能被人类感知。因此,文章主要讲的是核辐射的秘密。故选C。2.WhatisNOTthereasonwhynuclearradiationhasacertainmys
8、tery?A.Thehurtcellscanstayinthebodymanyyearsandthengrowintocancer.B.Itcandoharmtoapersonwhilethevictimisn’tawarethedamagehasoccurred.C.Nuclearradiationcankillapersonveryeasi