下图反映的是中国20世纪50年代至80年代城镇人口数的变化情况。其中

下图反映的是中国20世纪50年代至80年代城镇人口数的变化情况。其中,导致从CD变化的主要原因是                      

A.“一五”计划的完成                  B.“大跃进”和人民公社化运动的影响     

C.国民经济的调整                     D.“文化大革命”的开展

答案

C

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