问答题
Language: Is It Always Spoken? 1 Most of us know a little about how babies learn to talk. From the time infants are born , they hear language because their parents talk to them all the time. Between
31. What is babbling?32. At what age do most infants babble?33. What is the full name for ASL?34. What theory does Dr. Petitto believe about language learning?35. Who does Dr. Petitto want to study to prove the theory?
