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1、到乌蒙山区的昭通;从甘肃中部的定西，到内蒙古边陲的阿尔山，看真贫、知真贫，真扶贫、扶真贫，成为“花的精力最多”的事;“扶贫先扶志”“扶贫必扶智”“实施精准扶贫”Unit1GreatscientistsⅠ.阅读理解Nuclearradiationhasacertainmysteryaboutit,partlybecauseitcannotbedetectedbyhumansenses.Itcan’tbeseenorheard,ortouchedortasted,eventhoughitmaybeallaroundus.The
2、reareotherthingslikethat.Forexample,radiowavesareallaroundusbutwecan’tdetectthem,sensethem,withoutaradioreceiver.Similarly,wecan’tsenseradioactivitywithoutaradiationdetector.Butunlikecommonradiowaves,nuclearradiationisnotharmlesstohumanbeingsandotherlivingthings.A
3、tveryhighlevels,radiationcankillananimalorhumanbeingoutright(彻底地)bykillingmassesofcellsinimportantorgans.Buteventhelowestlevelscandoseriousdamage.Thereisnolevelofradiationthatiscompletelysafe.Iftheradiationdoesnothitanythingimportant,thedamagemaynotbesignificant.T
4、hisisthecasewhenonlyafewcellsarehit,andiftherearekilledoutright.Yourbodywillreplacethedeadcellswithhealthyones.Butifthefewcellsareonlydamaged,andiftheyreproducethemselves,youmaybeintrouble.Theyreproducethemselvesinanunusualway.Theycangrowintocancer.Sometimesthisdo
5、esnotshowupformanyyears.Thisisanotherreasonforsomeofthemysteryaboutnuclearradiation.Seriousdamagecanbedonewithouttheknowledgeofthepersonatthetimethatdamagehasoccurred.Apersoncanbeirradiated(放射治疗)andfeelfine,thendieofcancerfive,ten,ortwentyyearslaterasaresult.Orach
6、ildcanbebornweakoreasytogetseriousillnessasaresultofradiationabsorbedbyitsgrandparents.Radiationcanhurtus.Wemustknowthetruth.1.Accordingtothepassage,thedangerofnuclearpowerliesin____.A.nuclearmysteryB.radiationdetectionC.radiationlevelD.nuclearradiation2.Radiation
7、canleadtoseriousresultsevenatthelowestlevels______.A.whenitkillsfewcellsB.ifitdamagesfewcells,andiftheyreproducethemselvesC.thoughthedamagedcellscanrepairthemselvesD.unlessthedamagedcellscanreproducethemselves3.Radiationcanhurtusinthewaythatitcan______.A.killlarge
8、numbersofcellstocausedeathimmediatelyB.damagecellswhichmaygrowintocanceryearslaterC.affectthehealthygrowthofouryoungergenerationD.leadtoalloftheaboveres
