…………………………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………………………………………………. 3- Légendez le schéma ………………………………………………………………………………………………………………………… Exercice2 Exercice 3 Exercice4 Exercice 5 Exercice 6