file padat

http://www.ziddu.com/download/16995384/DifraksiKristal.ppt.html

bio um

temen2 file materi bioum bisa diunduh di
http://www.ziddu.com/download/16961347/GENETIKAmanusia.ppt.html

http://www.ziddu.com/download/16961348/peredarandarahmanusia.ppt.html