Lição 9 em vídeos e estudos com questionário

[youtube:1erb4re0]http://br.youtube.com/watch?v=I960VvuLlAE&feature=Pl ayList&p=C390277725F15AE4&inde x=1[/youtube:1erb4re0] [youtube:1erb4re0]http://br.youtube.com/watch?v=L18sOZiNzVU&feature=Pl ayList&p=C390277725F15AE4&inde x=2[/youtube:1erb4re0] [youtube:1erb4re0]http://br.youtube.com/watch?v=qJroZnj6AWs&feature=Pl ayList&p=C390277725F15AE4&inde x=3[/youtube:1erb4re0] [youtube:1erb4re0]http://br.youtube.com/watch?v=lcswDKpZd9E&feature=Pl ayList&p=C390277725F15AE4&inde x=4[/youtube:1erb4re0]