为安全实施爆破作业，两人以上共同作业时应指定（）。
参考答案：一人为负责人
______ is to be awarded the highest award at this evening’s meeting.
A．Both the director and the writer
B．Both of the director and the writer
C．The director and the writer
D．The director and writer
库存可以分为独立需求库存与相关需求库存。
