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【Nuclearpower'sdangertohealthsafetyandevenlifeitselfcanbedescribedinoneword;radiation(辐射).Nuclearradiationhasacertainmysteryaboutitpartlybecauseitcannotbedetected(探测)byhumansenses.Itcan't】
 更新时间:2024-05-03 15:46:35
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问题描述:

Nuclearpower'sdangertohealthsafetyandevenlifeitselfcanbedescribedinoneword;radiation(辐射).

Nuclearradiationhasacertainmysteryaboutitpartlybecauseitcannotbedetected(探测)byhumansenses.Itcan'tbeseenorheardortouchedortastedeventhoughitmaybeallaroundus.Thereareotherthingslikethat.Forexampleradiowavesareallaroundusbutwecan'tdetectthemsensethemwithoutaradioreceiver.Similarlywecan'tsenseradioactivitywithoutaradiationdetector.Butunlikecommonradiowavesnuclearradiationisnotharmlesstohumanbeingsandotherlivingthings.

Atveryhighlevelsradiationcankillananimalorhumanbeingcompletelybykillingmassesofcellsinimportantorgans(器官).Buteventhelowestlevelscandoseriousdamage.Thereisnolevelofradiationthatiscompletelysafe.Iftheradiationdoesnothitanythingimportantthedamagemaynotbesignificant.Thisisthecasewhenonlyafewcellsarehitandiftheyarekilledcompletely.Yourbodywillreplacethedeadcellswithhealthyones.Butifthefewcellsareonlydamagedandiftheyreproducethemselvesyoumaybeintrouble.Theyreproducethemselvesinanunusualway.Theycangrowintocancer.Sometimesthisdoesnotshowupformanyyears.

Thisisanotherreasonforsomeofthemysteryaboutnuclearradiation.Seriousdamagecanbedonewithouttheknowledgeofthepersonatthetimethatdamagehasoccurred.Apersoncanbeirradiated(放射治疗)andfeelfinethendieofcancerfivetenortwentyyearslaterasaresult.Orachildcanbebornweakoreasytogetseriousillnessasaresultofradiationabsorbedbyitsgrandparents.

Radiationcanhurtus.Wemustknowthetruth.

Accordingtothepassagethedangerofnuclearpowerliesin__________.

A.nuclearmystery B.radiationdetection

C.radiationlevel D.nuclearradiation

Radiationcanleadtoseriousresultsevenatthelowestlevel________.

A.whenitkillsfewcells B.ifitdamagesfewcells

C.thoughthedamagedcellscanrepairthemselves

D.unlessthedamagedcellscanreproducethemselves

Radiationcanhurtusinthewaythatitcan_____.

A.killlargenumbersofcellsinmainorganssoastocaus

乔浩回答:
  【小题1】D   【小题2】B   【小题3】D   【小题4】A
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