单项选择题
设某企业销售三种不同类型的可比商品,其销售量和价格资料如下: 根据上述资料请回答:
A.117.86% B.138.65% C.141.94% D.157.06%
A.100.05% B.118.62% C.132.32% D.138.57%
A.连续变量数列 B.离散变量数列 C.组距式变量数列 D.单项式变量数列