ų ѱ   1 ϴ .    ϱ?    ſ پѵ, 鿪ü ̻, 
   Ǵ ߱ݼ, ڿܼ, 缱, ̷  ߾   ͼ   ü ̸   .
  ϸ 踦 ǿ ʰ,  , Ͽ  3.5ð ̻ ϰ,  Ľ  鿡 Ͽ ɸ 
  ݴ Ȱ  1/3  Ұߴٰ Ѵ.  ϱ ؼ  ,     Ļ縦 ϰ Ģ 
  ü ϸ鼭 ǰ ĻȰ  Ѿ Ѵ. Ҹ ִ  鿪 ߷ ߾Ϲ ǥ DZ Ѵ.
, 
츮 ϻ Ȱ ӿ  ִ ߾Ϲ ϴ ͵ ߿ϴ. ǥ ߾Ϲ , 缱  , Ÿ ſ, , ߱ݼ, ,  
 ȭй, ǰ  ,  ̿ ̷  ſ پϴ.
 Ȱ  ؾ  ߾Ϲ 7 1.   
=
1.   
=  ҷ  ,  Ǹ  ҿ ߴ ָ ų  ִ.
2.   
= ذ  80% ̻  ǹǷ ö   ȯⰡ   Ǵ  ؾ Ѵ.
3. 
  =   2009   ǹ     ִµ ü  ؾ Ѵ.
4. öƽ 峭 =öƽ 峭̳ пǰ  PVC ı  ģ. Ư ̵ ǿ 峭ġ  ӿ 
 ƾ Ѵ.
5. Ŭ = ֹ  ȣ  ü ǹǷ Ŭ  ̵ 
  ʵ ؾ Ѵ.
6.  =ȭ, TV, ڷ   Ĵ ADHD ҷ  ִ. 
ϼ  ũ, ӻε ָϴ  .
7. ݶ =ݶ  ߾Ϲ 4-ƿ̴̹  ݶ 
 ǰ 24質     ִ.   ij Ҹ ϸϾƿ ϴ ݶ  Ѵ. ̷̶ ϴ ߾Ϲ 
  ˾ƾ Ѵ.
<  =    ̰ ִ /  >
ó: ǰ ñ , ̴
(www.hidoc.co.kr)