Author Topic: 初中数学竞赛交流微信群  (Read 1019 times)

yongcheng3315

  • Administrator
  • USAMO Winner
  • *****
  • Posts: 2555
初中数学竞赛交流微信群
« on: January 25, 2018, 02:14:47 PM »
建立一个初中数学竞赛交流微信群

Everyone is welcome!

活动准备开始了。
扫描进群 (click to enlarge the figure):
点击放大图像:

« Last Edit: January 26, 2018, 08:00:04 AM by yongcheng3315 »