题目

阅读短文，根据要求完成下面各小题。 A long time ago，there lived a famous philosopher（哲学家） named Zun-Nun．One day，a young man came to visit him and asked，Teacher，I do not understand why people like you dress in such a way．Isn't it necessary to dress well? The philosopher only smiled and took his ring from one of his fingers，and said，I will answer your question，but first do one thing for me．Take this ring and go to the market．Can you sell this for ten gold coins? Looking at Zun-Nun’s dirty ring，the young man became doubtful and replied，Ten gol图中的两个三角形是位似图形，它们的位似中心是（ ）A．点PB．点OC．点MD．点N