/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: nguyennhuthao710 https://public.slidesharecdn.com/v2/images/profile-picture.png C叩ch m畉�ng b畉�o kh担ng hay, nh但n d但n b畉�o kh担ng bi畉�t, khoa h畛�c c嘆n ��ang nghi棚n c畛�u