单项选择题A.To correct a common misunderstanding about grasshoppers.B.To help explain how well grasshoppers can jump.C.To compare the size of grasshopper with that of other insects.D.To show how quickly grasshoppers respond to danger.
单项选择题A.How grasshoppers find food.B.How grasshoppers fight other insects.C.How grasshoppers communicate with each other.D.How grasshoppers escape from danger.