28-3: The primary purpose of the passage is to discuss the A: techniques used in certain experiments on social learning in birds B: reasons for the differences between social learning in birds and in mammals C: question of how social learning manifests itself in birds D: basis for a widespread belief about a difference in behavior between birds and mammals E: possible reasons why birds may or may not learn from each other in a particular way 我做这个有问题:为什么选C呢?哪里有question呢?请指导!:) |