什么是单双数的概念简介：Hahaha, if I guessed correctly, there are four murderers in total, all of them strong, three are of medium build, and one is very strong. Why, are you doubting my ability?
Hahaha, if I guessed correctly, there are four murderers in total, all of them strong, three are of medium build, and one is very strong. Why, are you doubting my ability?
