Treesaregreatlyusefu的精选

问题详情：Treesaregreatlyusefultomaninthreeveryimportantways.Thefirstimportantwayisthattheyprovidemanwithfood,woodandotherproducts.Treesprovidenotonlymanwithfood,butalsomanyanimalswithfood.Withouttreesm...