2021年11月25日
acute
摘要： In Euclidean geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the a 阅读全文
posted @ 2021-11-25 23:19 Fun_with_Words 阅读(97) 评论(0) 推荐(0)

 张牌。