问题
单项选择题
（）is the Internet commerce designed for direct communications and commercial relationship between a firmand its end customer.
A.B2C
B.B2B
C.B2A
D.A2B
答案
参考答案：A
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（）is the Internet commerce designed for direct communications and commercial relationship between a firmand its end customer.
A.B2C
B.B2B
C.B2A
D.A2B
参考答案：A