[填空题]Man lives in communities. His social existence restricts his (36) in certain directions and extends it in others. Society (37) on him some limitations. People do not all engage in the same activities. They can be (38) from each other by the functions they perform. This process of differentiation is called specialization. Specialization prevents many members of an industrial society from developing intelligence and (39) . But some aspects of human society extend them beyond a point which can be (40) by animals or animal communities lacking the features which human society (41) possesses.
Western type (42) often claim that they provide "equality of opportunity" for all their citizens. At first sight it might seem that this implies the same chance for everyone of succeeding in his (43) occupation provided he is conscious of his goal and is willing to work hard. What the phrase actually implies is