NO.PZ2023112701000078
问题如下：
Which of the following is the closest example of a one-sided network?
选项：
A.An online employment website B.A dating website for men and women C.A social network for model train collectors解释：
Correct Answer: C
C is correct. A social network for model train collectors involves a single group of users and thus is closest to a one-side network.
The others involve two user groups: employers and job-seekers in A, men and women in B.
one-sided network是什么？哪里的知识点，忘了。什么是two-sided network.还有train model collector是什么？
