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1、专四阅读理解练习（一）thediscoveryoftheantarcticnotonlyprovedoneofthemostinterestingofallgeographicaladventures,butcreatedwhatmightbecalled“theheroicageofantarcticexploration”.bytheirtremendousheroism,mensuchasshakleton,scott,andamundsencausedanewcontinenttoemergefromtheshadows,andyetth
2、atheroicage,littlemorethanacenturyold,isalreadypassing.modernscienceandinventionsarerevolutionizingtheendurance,futurejourneysintotheseicywasteswillprobablydependonmotorvehiclesequippedwithcaterpillartractionratherthanonthedogsthatearlierdiscoverersfoundsoinvaluableandhardlyc
3、omparable. fewrealizethatthisantarcticcontinentisalmostequalinsizetosouthamerica,andenormousfieldofworkawaitsgeographersandprospectors.thecoastsofthiscontinentremaintobeaccuratelycharted,andthemapingofthewholeoftheinteriorpresentsaformidabletasktothecartographerswhoundertake
4、thework.oncetheirlaborsarecompleted,itwillbepossibletoprospectthevastnaturalresourceswhichscientistsbelievewillfurnishoneofthelargesttreasurehoardsofmetalsandmineralstheworldhasyetknown,andalmostinexhaustiblesourcesofcopper,coal,uranium,andmanyotheroreswillbecomeavailabletoma
5、n.suchdiscoverieswillusherinaneraofpracticalexploitationoftheantarcticwastes. thepolardarknesswhichhidesthiscontinentforthesixwintermonthswillbedefeatedbyhugebatteriesoflight,andmakepossibletheestablishingofair-fieldsforthefutureinter-continentalairservicesbymakingtheseareas
6、aslightasday.presentflyingrouteswillbecompletelychanged,fortheantarcticrefuelingbaseswillmakeflightsfromaustraliatosouthamericacomparativelyeasyoverthe5,000milesjourney. theclimateisnotlikelytoofferaninsuperableproblem,fortheexploreradmiralbyrdhasshownthattheclimateispossibl
7、eevenformencompletelyuntrainedforexpeditionsintothosefrozenwastes.someofhispartiesweremenwhohadneverseensnowbefore,andyetherecordsthattheysurvivedtherigorsoftheantarcticclimatecomfortably,sothat,providedthattheappropriateinstallationsaremade,wemayassumethathumanbeingsfromallc
8、ountriescouldlivetheresafely.byrdevenaffirmsthatitisprobablythemosth
