NorthAmericanbackbearsareshyanimals.Theyarefearfulbynat...
問題詳情：NorthAmericanbackbearsareshyanimals.Theyarefearfulbynature,andwillusuallyrunawayiftheyseeorhearpeople.Becauseofthis,itcanbedifficultforscientiststolearnabouttheseanimals.Inordertostudyblackbea...