1753
2015-03-17 13:13:17
1
http://ko.wikipedia.org/wiki/%EC%83%81_(%EB%AC%BC%EB%A6%AC%ED%95%99)
일단 이런건 너무 어려워서 초등학생이 이해하기는 힘들 것 같고..
http://newdle.noonnoppi.com/xmlView.aspx?xmldid=112740
뭔가 이런거나
https://www.google.co.kr/url?sa=t&rct=j&q=&esrc=s&source=web&cd=11&ved=0CFIQFjAK&url=http%3A%2F%2Fwww.seoulnong.sc.kr%2Fcou%2Fscience-m1%2Fppt%2F%25EB%258B%25A8%25EC%259B%2590%252004_%25EB%25AC%25BC%25EC%25A7%2588%25EC%259D%2598%2520%25EC%2584%25B8%2520%25EA%25B0%2580%25EC%25A7%2580%2520%25EC%2583%2581%25ED%2583%259C.ppt&ei=MqkHVYWDN-G3mQWt9oLwDg&usg=AFQjCNHjoCZsBFF88LNOIiKajkzK6WZfIw&bvm=bv.88198703,d.dGY&cad=rjt
이런 거나
https://prezi.com/u_xymtgvpapw/presentation/
이런게 좀 도움이 되지 않을까 싶은데요.