（ ）不属于在产品开发中需要注意的宏观经济因素。
A．商业周期
B．产品销售渠道
C．通货膨胀
D．全球经济趋势
参考答案：B
— I'm sorry; I shouldn't have been so rude to you.
— You _____ something not very nice to me, but that's OK. [ ]
A. have said
B. had said
C. were saying
D. did say
优秀企业与落后企业的差距有哪些？
