字典翻译 问答 小学 英语 Nuclearpower’sdangertohealthsafetyandevenlifeitselfcanbesummedupinoneword:radiation.Nuclearradiationhasacertainmysteryaboutitpartlybecauseitcannotbedetectedbyhumansenses.Itcan’tbeseenorheardort
问题标题:
Nuclearpower’sdangertohealthsafetyandevenlifeitselfcanbesummedupinoneword:radiation.Nuclearradiationhasacertainmysteryaboutitpartlybecauseitcannotbedetectedbyhumansenses.Itcan’tbeseenorheardort
问题描述:

Nuclearpower’sdangertohealthsafetyandevenlifeitselfcanbesummedupinoneword:radiation.

Nuclearradiationhasacertainmysteryaboutitpartlybecauseitcannotbedetectedbyhumansenses.Itcan’tbeseenorheardortouchedortastedeventhoughitmaybeallaroundus.Thereareotherthingslikethat.Forexampleradiowavesareallaroundusbutwecan’tdetectthemsensethemwithoutaradioreceiver.Similarlywecan’tsenseradioactivitywithoutaradiationdetector.Butunlikecommonradiowavesnuclearradiationisnotharmlesstohumanbeingsandotherlivingthings.

Atveryhighlevelsradiationcankillananimalorhumanbeingimmediatelybykillingmassesofcellsinvitalorgans.Buteventhelowestlevelscandoseriousdamage.Thereisnolevelsofradiationthatiscompletelysafe.Iftheradiationdoesnothitanythingimportantthedamagemaynotbeserious.Thisisthecasewhenonlyafewcellsarehitandiftheyarekilledimmediately.Yourbodywillreplacethedeadcellswithhealthyones.Butifthefewcellsareonlydamagedandiftheyreproducethemselvesyoumaybeintrouble.Theycangrowintocancer.Sometimesthisdoesnotshowupformanyyears.

Thisisanotherreasonforsomeofthemysteryaboutnuclearradiation.Seriousdamagecanbedonewithoutthevictimbeingawareatthetimethatdamagehasoccurred.Apersoncanbeirradiated(辐射)andfeelfinethendieforcancerfivetenortwentyyearslaterasaresult.Orachildcanbebornweakasaresultofradiationabsorbedbyitsgrandparents.

Radiationcanhurtus.Wemustknowthetruth.

【小题1】Whichofthefollowingstatementsistrue?

A.Nuclearradiationisjustlikecommonradiowaves. B.Nuclearradiationcancausecancertohumanbeings. C.Nuclearradiationcanbedetectedbyhumansenses. D.Nuclearradiationcanbesafetohumanbeingsifitslevelislow. 【小题2】Howcannuclearradiationkillananimal? A.Bydamagingitsheart. B.Bykillingafewcells. C.Byhittinganyplaceinitsbody. D.Bykillingmanycellsinimportantorgans.

胡学雄回答:
  【小题1】B【小题2】D【小题3】D 解析分析:文章介绍核辐射对人类和动物的危害,如果辐射较弱,可能会危害健康,有的影响不是明显的,但是人们可能多年后会死于癌症,或会对后代产生影响...
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