分配层次结构
参考答案：
您可以分别为库存组织中的单个物料、所有物料、物料类别及地点和组织指定补充来源规则和分配清单。这些分配相互之间具有一定的优先顺序。
—Where have you been, David? You're late for class again.
—________ My bus got caught in a traffic jam.
A．Yes, so what?
B．Well, how come?
C．Sorry, but I couldn't help.
D．No, it's not my fault.
