Social distance varies from species to species.It is quite short—apparently only a few yards—among some animals,and quite long among others.
Social distance is not always rigidly(刻板地) fixed but is determined in part by the situation.When the young of apes and humans are mobile but not yet under control of the mother’s voice,social distance may be the length of her reach.This is readily observed among baboons(狒狒) in a zoo.When the baby approaches a certain point,the mother reaches out to seize the end of its tail and pull it back to her.When added control is needed because of danger,social distance shortens.To show this in man,one has only to watch a family with a number of small children holding hands as they cross a busy street.
1.Which of the following is the most suitable explanation to “Flight distance”?
A.Distance between animals of the same species before escaping.
B.Distance between large and small animals before escaping.
C.Distance between an animal and its enemy before escaping.
D.Distance between certain animal species before escaping.
2.If a lion’s critical distance is penetrated,it will
.
A.begin to attackB.try to hide
C.begin to jumpD.run away
3.The example of the children holding hands when crossing the street in the last paragraph shows that
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