冠亚和19的概率简介：Cheng Keshu doesn't have many books. What's surprising is that her books are all neatly arranged without any corner or crease. They are wrapped in various book covers. Of course, there are also a few stickers used by little girls.
Cheng Keshu doesn't have many books. What's surprising is that her books are all neatly arranged without any corner or crease. They are wrapped in various book covers. Of course, there are also a few stickers used by little girls.
