THENORTHPOLE美国教材课件
日期：2010-07-20 07:47
allpointsaresouthofyou(eastandwesthavenobearing)Sincetheearthsrotationtakesplaceonceevery24hoursIfyoureattheNorthPole，yourspeedofrotationisquiteslowatalmostnospeedatall，seaicecoverstheNorthPolebutrecently，waterhasbeensightedattheexactlocationofthepoleIfyourestandingattheNorthPole，038milesperhourAnimalsliveontheNorthPole，TheNorthPoleisabout450miles(725km)northofGreenlandinthemiddleoftheArcticOcean-theseatherehasadepthof13，comparedtothespeedattheequatoratabout1，410feet(4087meters)Mostofthetime，butpeoplecannotbearthecoldandsnowyweatherthereSealslivemuchofthetimeunderthewateratthenorthpoleTheycomeupforairevery20minutesTheymakeholesintheicePolarbearshuntsealsTheywaitbytheholesintheiceandgrabthesealswhentheycomeupforair，
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