每一个实数都能用有理数去逼近到任意精确的程度,这就是有理数的稠密性。The rational points are dense on the number axis. 相关文章: 2021-10-19 2022-12-23 2021-11-30 2022-12-23 2022-12-23 2022-12-23 2022-12-23 2021-11-28