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1、最新人教版高中英语必修五综合测试题全套及答案::::单元检测卷（二十一）必修5Unit1::::I•阅读理解Nuclearradiationhasacertainmysteryaboutit,partlybecauseitcannotbedetectedbyhumansenses.ItcarVtbeseenorheard,ortouchedortasted,eventhoughitmaybeallaroundus.Thereareotherthingslikethat・Forexample,radiowavesareallarou
2、ndlusbutwecan"tdetectthem,sensethem,withoutaradioreceiver.Similarly,wecarftsenseradioactivity,withoutaradiationdetector.Butunlikecommonradiowaves,nuclearradiatio*nisnotharmlesstohumanbeingsandotherlivingthings.Atveryhighlevels,radiationcankillananimalorhumanbeingoutri
3、ght（彻底地）bykillingmassesofcellsinimportantorgans.Buteventhelowestlevelscandoseriousdamage・Thereisnolevelofradiationthatiscompletelysafe・Iftheradiationdoesnothitanythingimportant,thedamagemaynotbesignificant・Thisisthecasewhenonlyafewcellsarehit,andiftherearekilledoutrig
4、ht.Yourbodywillreplacethedeadcellswithhealthyones.Butifthefewcellsareonlydamaged,andiftheyreproducethemselves,youmaybeintrouble・Theyreproducethemselvesinanunusualway・Theycangrowintocancer.Sometimesthisdoesnotshowupformanyyears・Thisisanotherreasonforsomeofthemysteryabo
5、utnuclearradiation.Seriousdamagecanbedonewithouttheknowledgeofthepersonatthetimethatdamagehasoccurred.Apersoncanbeirradiated（放身寸治扌亍）andfeelfine,thendieofcancerfive,ten,ortwentyyearslaterasaresult・Orachildcanbebornweakoreasytogetseriousillnessasaresultofradiationabsorb
6、edbyitsgrandparents・Radiationcanhurtus.Wemustknowthetruth.1.Accordingtothepassage,thedangerofnuclearpowerliesin.A.nuclearmysteryB.radiationdetectionC.radiationlevelD.nuclearradiation2.Radiationcanleadtoseriousresultsevenatthelowestlevels.A.whenitkillsfewcellsB.ifitdam
7、agesfewcells,andiftheyreproducethemselvesC.thoughthedamagedcellscanrepairthemselvesD.unlessthedamagedcellscanreproducethemselves3・Radiationcanhurtusinthewaythatitcan.A.killlargenumbersofcellstocausedeathimmediatelyA.damagecellswhichmaygrowintocanceryearslaterB.affectt
8、hehealthygrowthofouryoungergenerationD」eadtoalloftheaboveresults4.Whichofthefollowingcanbemostlypossiblyinferredfromthepassa
