供应链采购的基础是企业之间实现( )
A.资金共享
B.信息共享
C.批量采购
D.定期采购
参考答案:B
I have been living in the United States for 20 years, but seldom ________ so lonely as now.
A.have I felt
B.I had felt
C.I have felt
D.had I felt
谈判的基本方式?