（）不是生产物流的作用。
A.降低生产制造成本
B.保障生产过程连续运行
C.保障生产过程平衡运行
D.产成品存货合理化
参考答案：D
______everybody enjoys fresh cut flowers around his house．few people know how to keep them for as long as possible．
A．Because
B．Since
C．While
D．If
I’m just wondering ___ I first met Tom.
A．where it was that
B．that was it where
C．where was it that
D．that it was where
