下图所示票证曾是百姓购买生活物资的凭证,但现在已经失去了它原

下图所示票证曾是百姓购买生活物资的凭证,但现在已经失去了它原本的作用。这一变化的主要原因不包括(  

A.经济体制改革深化  

B.农业产量稳步增加  

C.生活物资日益丰富  

D.粮棉物资统一管理

答案

B

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