(1x-y+1x+y)÷xyx2-y2=x+y+x-y(x-y)(x+y)•x2-y2xy=2y.
.— Jane Goodall is a great woman.
— ________. She has done so much to protect chimps everywhere.
A.Good idea
B.Congratulations
C.I think so
D.The same to you
营业推广的方式包括()。
A.针对顾客的营业推广
B.针对竞争者的营业推广
C.针对销售人员的销售促进
D.针对中间商的营业推广