SOLVANTS
Un solvant
est un liquide permettant de dissoudre un liquide, un gaz ou un solide. Il en
existe 2 catégories principales : - Solvant
chloré (dit halogéné) utilisé en imprimerie, en pressing comme le perchloréthylène - Solvant
non chloré comme le
Did you know that Langston Hughes was only 18 when he wrote the classic American poem The Negro Speaks of Rivers? This is a poem that every child should know, and here is a gorgeous picture book you can use to share it! This poem is so visual that it...