A．customer service B．packing and storage C．transportation D．traffic control
单项选择题（）的仓库作业流程比较复杂。
A．整进整出 B．整进零出、零进整出 C．零进零出 D．货主进出货时间不规则
单项选择题Logistics is about the （） flow, like the movement of materials, goods, cargo and freight.
A．article B．products C．service D．equipment
