02/ Identifier les éléments 1, 2 et 3 de la structure : – a) 1 = nervure 2 = couple 3 = lisse – b) 1 = longeron 2 = nervure 3 = entretoise – c) 1 = poutre 2 = traverse 3 = semelle – d) 1 = couple 2 = entretoise 3 = traverse