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1、2019-2020年高考英语一轮复习Unit1Greatscientists单元检测卷新人教版必修Ⅰ.阅读理解Nuclearradiationhasacertainmysteryaboutit,partlybecauseitcannotbedetectedbyhumansenses.Itcan’tbeseenorheard,ortouchedortasted,eventhoughitmaybeallaroundus.Thereareotherthingslikethat.Forexample,radiowavesareallarou
2、ndusbutwecan’tdetectthem,sensethem,withoutaradioreceiver.Similarly,wecan’tsenseradioactivitywithoutaradiationdetector.Butunlikemonradiowaves,nuclearradiationisnotharmlesstohumanbeingsandotherlivingthings.Atveryhighlevels,radiationcankillananimalorhumanbeingoutright(彻底地
3、)bykillingmassesofcellsinimportantorgans.Buteventhelowestlevelscandoseriousdamage.Thereisnolevelofradiationthatispletelysafe.Iftheradiationdoesnothitanythingimportant,thedamagemaynotbesignificant.Thisisthecasewhenonlyafewcellsarehit,andiftherearekilledoutright.Yourbody
4、willreplacethedeadcellswithhealthyones.Butifthefewcellsareonlydamaged,andiftheyreproducethemselves,youmaybeintrouble.Theyreproducethemselvesinanunusualway.Theycangrowintocancer.Sometimesthisdoesnotshowupformanyyears.Thisisanotherreasonforsomeofthemysteryaboutnuclearrad
5、iation.Seriousdamagecanbedonewithouttheknowledgeofthepersonatthetimethatdamagehasoccurred.Apersoncanbeirradiated(放射治疗)andfeelfine,thendieofcancerfive,ten,ortwentyyearslaterasaresult.Orachildcanbebornweakoreasytogetseriousillnessasaresultofradiationabsorbedbyitsgrandpar
6、ents.Radiationcanhurtus.Wemustknowthetruth.1.Accordingtothepassage,thedangerofnuclearpowerliesin____.A.nuclearmysteryB.radiationdetectionC.radiationlevelD.nuclearradiation2.Radiationcanleadtoseriousresultsevenatthelowestlevels______.A.whenitkillsfewcellsB.ifitdamagesfe
7、wcells,andiftheyreproducethemselvesC.thoughthedamagedcellscanrepairthemselvesD.unlessthedamagedcellscanreproducethemselves3.Radiationcanhurtusinthewaythatitcan______.A.killlargenumbersofcellstocausedeathimmediatelyB.damagecellswhichmaygrowintocanceryearslaterC.affectth
8、ehealthygrowthofouryoungergenerationD.leadtoalloftheaboveresults4.Whichofthefollowingcanbemostlypossiblyinferredfromt
