What is black when it is clean and white when it is
作者：佚名 • 更新时间：2020-06-26 13:17:34 •阅读 0
What is black when it is clean and white when it is dirty?A blackboard.
本文收集于互联网，仅供参考，不代表本站立场，如有侵权请联系我们删除！！
