PMP, ڼø ȣ ¶ ܱ ۸ 1 24Ϻ 2 10ϱ ڻ ȸ 747 , ܱ н ϸ Դϱ? 縦 ߴ. , ü 55.2% شϴ 410 MP3÷̾ ߴ. ̾, ڻ 168(22.6%), PMP 144(19.4%) Ÿ. , PMP 30.3% 12.8% 17.5%Ʈ , ڻ 29.1%, 15.2% н PMP , ڻ ȣϴ ƴ. 2006 2 15 e-Learning Plus ȯ sih@contentsmedia.com