FormJulytoOctobereveryyear,aboutaquarteroftheworld’sblu...
问题详情：FormJulytoOctobereveryyear,aboutaquarteroftheworld’sbluewhalesfeedinthePacificOceanoffthecoastofCalifornia.Butthewhalesnowfaceamajorthreatintheirfavoritefeedingarea.Lotsofshipscarryingcargosa...