In descendent form To say sequence in descendent form of 5 numbers without showing 4 first letters, single is letter 5, completes it. EXAMPLE: To quickly say 25, 24, 23, 22 and letter 21 is. To make 3 sessions to the day of four sequences and in fourth making solution of problems
万分感激作者: mingyue_123 时间: 2007-10-29 20:51 也没人理我啊
