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【多选题】
下列关于平均消费倾向的说法，正确的有( )。A.
平均消费倾向随着收入的增加而减少
B.
平均消费倾向总是为正数
C.
收入很低时，平均消费倾向可能大于1
D.
随着收入的增加，平均消费倾向的数值也不断增加
E.
平均消费倾向介于0和1之间
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