Bluewhalesarethelargestanimalseverknowntohaveexistedont...
问题详情:Bluewhalesarethelargestanimalseverknowntohaveexistedontheplanet,andtheycangrowtoalengthof100feetandweighmorethan330,000pounds.Butrecentlyresearchershavefoundthatthesewhalesareonthemoveandtheyh...