Forsometimepast,ithasbeenwidelyacceptedthatbabies—andot...
問題詳情：Forsometimepast,ithasbeenwidelyacceptedthatbabies—andothercreatures—learntodothingsbecausecertainactsleadto“rewards(報酬)”,andthereisnoreasontodoubtthatthisistrue.Butitusedalsotobewidelybe...