Curve a might represent the frequency distribution of the number of days' supply on hand in the perishable grocery business . 曲线A可用以刻画食品商人手中易霉货物储备天数的频率分布。
2.
Curve a might represent the frequency distribution of the number of days ' supply on hand in the perishable grocery business 曲线a可用以刻画食品商人手中易霉货物储备天数的频率分布。