单项选择题
Saving or reducing expenditure in business is（）
A.save money B.increase cost C.cost planning D.cost control
单项选择题 （）is guaranteed by the full market supply and just-in-time logistics.
单项选择题 （）has 3 specific points: fixed port, fixed line and announcing shipping time in advance.
单项选择题 （）is very convenient equipment for loading and unloading goods.
