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Globalwarmingisatrendtowardwarmerconditionsaroundtheworld.Partofthewarmingisnatural;wehaveexperienceda20,000-year-longwarmingasthelasticeageendedandtheice36.melted(I)away.However,wehavealreadyreachedtemperaturesthatarein37.line(G)withotherminimum-iceperiods,socontinuedwarmingislikelynotnatural.Weare38.Contributing(C)toapredictedworldwideincreaseintemperatures39.ranging(K)between1℃and6℃overthenext100years.Thewarmingwillbemore40.dramatic(D)insomeareas,lessinothers,andsomeplacesmayevencooloff.Likewise,the41.impact(F)ofthiswarmingwillbeverydifferentdependingonwhereyouare—coastalareasmustworryaboutrisingsealevels,whileSiberiaandnorthernCanadamaybecomemorehabitable(宜居的)and42.appealing(A)forhumansthantheseareasarenow.Thefactremains,however,thatitwilllikelygetwarmer,on43.average(B),everywhere.Scientistsareingeneralagreementthatthewarmerconditionswehavebeenexperiencingareatleastinparttheresultofahuman-inducedglobalwarmingtrend.Somescientists44.maintain(H)thatthechangesweareseeingfallwithintherangeofrandom(无规律的)variation—someyearsarecold,otherswarm,andwehavejusthadanunremarkablestringofwarmyears45.recently(L)—butthatisbecominganincreasinglyrareinterpretationinthefaceofcontinuedandincreasingwarmconditions.A)appealingB)averageC)contributingD)dramaticE)frequentlyF)impactG)lineH)maintainI)meltedJ)persistK)rangingL)recentlyM)resolvedN)sensibleO)shock