协同价值
参考答案:
当新的用户加入网络时,老用户从中获得的额外价值,协同价值取决于网络规模。协同价值越大,消费者的支付意愿就越高,协同价值在网络经济中十分显著。
—My daughter has passed the exam.
—Congratulations! She’s really excellent.
— ____________.
A.No, no, she is nothing
B.Oh, thank you
C.Sometimes she is intelligent
D.You are right
龋病资料整理一般不以哪项分组
A.年龄B.文化程度C.性别D.城乡E.民族