DateKaname | 1 points | May 13 2021 17:32:35
简单随机抽样
https://preview.redd.it/t000pz70bxy61.png?width=752&format=png&auto=webp&s=e246a407e9811e0ef47fa248017940a6a9b4c37a
https://preview.redd.it/nqzwh280bxy61.png?width=304&format=png&auto=webp&s=c6873ccfd1b90b4e8fdfa1e47d461eaa265a6856
https://preview.redd.it/csadm080bxy61.png?width=749&format=png&auto=webp&s=02b82dc866c8e2505bacc213adb493d170763ede