248期：【05,06,11,22,28,29,36,42,44,49】开（12）准√
249期：【01,19,20,23,24,29,34,36,39,42】开（02）准√
250期：【04,05,08,17,20,24,41,43,44,49】开（12）准√
251期： 【03,17,19,21,28,31,36,37,39,42】开（？）