Notlongago,peoplethoughtbabieswerenotabletolearnthingsu...
问题详情：Notlongago,peoplethoughtbabieswerenotabletolearnthingsuntiltheywerefiveorsixmonthsold.YetdoctorsintheUnitedStatessaybabiesbeginlearningontheirfirstdayoflife． Scientistsnotethatbabies...