当企业的原材料成本、加工成本不可能再降低时，可以通过降低（）.
A.交易费用
B.物流成本
C.运输成本
D.仓储成本
参考答案：B
The old gentleman claimed himself to be a very __________ man, who had never told a lie in his life.[ ]
A. normal
B. moral
C. wise
D. clever
白通汤功效与作用
