Therearethreeseparatesourcesofdangerinsupplyingenergybynuclearpower(原子能).First,theradioactivematerialmusttravelfromitsplaceofproductiontothepowerstation.Althoughthepowerstationsthemselvesarestronglybuilt,

　　Therearethreeseparatesourcesofdangerinsupplyingenergybynuclearpower(原子能).

　　First,theradioactivematerialmusttravelfromitsplaceofproductiontothepowerstation.Althoughthepowerstationsthemselvesarestronglybuilt,thecontainersusedforthetransportofthematerialsarenot.Normally,onlytwomethodsoftransportareinuse,namelyroadorrail.Unfortunately,bothofthesemayhaveaneffectonthegeneralpublic,sincetheyaresuretopassnear,oreventhrough,heavilypopulatedareas.

　　Second,thereistheproblemofwaste.Allnuclearpowerstationsproducewastesthatinmostcaseswillremainradioactiveforthousandsofyears.Itisimpossibletomakethesewastesnonradioactive,andsotheymustbestoredinoneoftheinconvenientwaysthatscientistshaveinvented.Forexample,theymaybeburiedundertheground,ordroppedintodesertedmines,orsunkinthesea.However,thesemethodsdonotsolvetheproblem,sinceanearthquakecouldeasilybreakthecontainers.

　　Third,theremayoccurthedangerofaleak(泄漏)oranexplosionatthepowerstation.Aswiththeothertwodangers,thisisnotverylikely,soitdoesnotprovideaseriousobjectiontothenuclearprogram.However,itcanhappen.Separately,thesethreetypesofdangersarenotagreatcauseforworry.Takentogether,though,theprobabilityofdisaster(灾难)isextremelyhigh.

　　1.WhichofthefollowingisFALSE?

　　A.Itispossiblethataleakoranexplosionoccursatapowerstation.

　　B.Itisunusualforradioactivematerialstobetransportedacrossland.

　　C.Thecontainersarelikelytobebrokenbyanearthquake.

　　D.Nuclearwastesremaindangerousinmostcasesformanyyears.

　　2.Theauthorthinksthatthewaystostorenuclearwastesare________.

　　A.easy B.impossible C.reasonable D.ineffective

　　3.Whatdowelearnfromthelastparagraph?

　　A.Thepowerstationisasafeplace.

　　B.Thedangersofnuclearenergycanbeprevented.

　　C.Thegeneralpublicarestronglyagainstthenuclearprogram.

　　Byitself,noneofthethreedangersisverylikelytocausemuchworry.

　　4.Whatisthispassageabout