A.To show some men depend on a particular food.B.To show the diet of some people is st

外语类 公共英语 已帮助 人

A.To show some men depend on a particular food.

B.To show the diet of some people is still primitive.

C.To show different people eat different foods.

D.To show the adaptability of man in terms of his diet.

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热搜:a是b的充分条件,b是a的必要条件吗