Originally posted by pyliu at 2006-1-11 16:42:9 f% G: D5 t# ^ 問題:已知媽媽比兒子大21歲。六年後,媽媽的歲數是兒子的五倍。問爸爸現在在哪裏?
Originally posted by Tokyo2040 at 2006-1-11 09:54 AM: ' x+ g5 I' m. \& g/ G( S爸爸喺到happy緊