Treesaregreatlyusefu的精選

問題詳情：Treesaregreatlyusefultomaninthreeveryimportantways.Thefirstimportantwayisthattheyprovidemanwithfood,woodandotherproducts.Treesprovidenotonlymanwithfood,butalsomanyanimalswithfood.Withouttreesm...