icisimportantbecauseA.thereisplentyoffueltomaketheelecuicityneededtooperateradarB.inthecold,clearair,metalwouldnotrustC.ascanningstationattheSouthPolecouldcoverthewholesouthernhemisphereD.thecoldclearairwouldhelpradarseeclearly52.ToascientistthemainreasonforexploringtheAntarcticisA.thefactthatweknowlittleaboutitB.thefactthatithasmanyunusualfeaturesC.thebenefitstomankindD.theopportunitytostudytheweatherQuestions53to56arebasedonthefollowingpassage:oolGuaranteeThisguaranteecoversallRyersonindustrialtools.DatesofCoverage:AllRyersonindustrialtoolsareguaranteedfor5yearsfromthedateofreceiptatthecustomer'sfactoryorindustrialfacility.TypeofCoverage:Thisguaranteecoversallmajortoolfailuresclearlyattributabletotooldesignorconstruction,andnotordinarywearandtear.Thiscoveragealsodoesnotextendtosituations
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