2018年8月11日
思维题(直角三角形)
摘要： Katya studies in a fifth grade. Recently her class studied right triangles and the Pythagorean theorem. It appeared, that there are triples of positiv 阅读全文
posted @ 2018-08-11 08:38 我的秘密小屋 阅读(235) 评论(0) 推荐(0)