专八真题及答案(四篇)

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专八作文真题及答案篇二专八作文真题及答案篇四

nucleartechnology:benecialordisastrous?

onequestionthathascausedagreatdealofcontroversyovertheyearsisnucleartechnology.althoughitoffersanumberofadvantagesinworldpeaceandgreenpower,itisalsoadangeroustechnology.nuclearweaponsposethegreatestthreattolife.eventheuseofnucleartechnologyforpeacefulpurposesalsocarriessomeseriousrisks.inthisessay,however,iintendtoshowhowthebenetsofsuchtechnologycounterbalanceitsdisadvantages.

theopponentsofnuclearpowergenerallybasetheirargumentsonthedangeritpresentstotheworld.therearetwomaindangers:theriskofnuclearwarfareandthenucleardisasters.thedangerofnuclearwarisobviousandifonethinksaboutchernobyl,itiseasytounderstandwhypeopleareworriedaboutnuclearpower,asitcancausemajorsuffering.

thereare,however,goodreasonsforbelievingthatnucleartechnologyisgenerallyadvantageous.thefirstoftheseisthattherehasnotbeenamajorworldconflictsincetheinventionofnuclearweapons.althoughnuclearweaponshaveenlargedthemechanismofwarbythreateningtokillmorepeoplemoresecretlyandmorehorriblythanthoseofthepast,itisgenerallyagreedthatsuchweaponsshouldbethelastthingtobethoughtofasameanstowinawarbecausetherewouldbenowinnerinanynuclearconflict.ifanythinggoeswrong,thescaleofdestructiononhumanlivesandcivilizationisbeyondimagination.thenightmareofhiroshimaisavividmemory,sonuclearweaponshiddeninstocksomewhereservetomaintainworldpeacebytheoryofcounter-attack.

theothermostsignificantbenefitrelatestotheenvironment.perhapsthegreatestdangerfacingourworldtodayisacombinationofglobalwarmingandthegreenhouseeffect.thisdangeriscausedpartlybyburningfossilfuel,whichleadstoourpollutedatmosphere.nuclearpower,however,isamuchgreeneralternativewhichdoesnothavesuchnegativeeffects.

alreadypowerplantshavebeeninoperationinanumberofcountries.thesearesuccessfulexamplestobefollowed.allinall,althoughitistruethatnuclearweaponsposethegreatestthreattolife,theuseofnucleartechnologyforpeacefulpurposesisre