ThePacificOcean
ThePacificOceanisthe（61）___ （large）oftheEarth'soceans，（62）___（cover）about46%oftheEarth'swatersurfaceand32%ofitstotalsurfacearea．Itextends（63）___theArcticinthenorthtotheAntarcticainthesouth，surroundedbyAsiaandAustraliainthewestandtheAmericasintheeast．ThePacificOceancontainsabout25，000islands．The（64）___（major）ofthemarefoundsouthoftheequator．（65）___waterneartheequatorislesssaltythanthatfoundinthemid-latitudes（中纬度）for（66）___（abundance）equatorialprecipitation（赤道降水）throughouttheyear．ThesurfacecirculationofPacificwatersis（67）___（general）clockwiseintheNorthernHemisphereandcounter-clockwiseintheSouthernHemisphere．TheexploitationofthePacific'smineralwealthisvarious，（68）___ isinfluencedbytheocean'sgreatdepths．InshallowwatersoffthecoastsofAustraliaandNewZealand，naturalgasisproduced，andpearls（69）___（harvest）alongthecoastsofAustralia，JapanandthePhilippines．Onemorethingworth（70）___（mention）isthatthePacific'sgreatestwealthisitsfish．