第64集:5.A引言
http://player.youku.com/player.php/sid/XMTg1OTY3OTQ4OA==/v.swf
第65集:5.B生产集(上)
http://player.youku.com/player.php/sid/XMTg1OTk5ODk4OA==/v.swf
第66集:5.B生产集(下)
http://player.youku.com/player.php/sid/XMTg2MDA4NDA0MA==/v.swf
第67集:5.B习题
http://player.youku.com/player.php/sid/XMTg2MTIwMTMwOA==/v.swf