Inlandwatersmaybegroupedintotwogeneralclasses:standingw...
問題詳情:Inlandwatersmaybegroupedintotwogeneralclasses:standingwatersandflowingwaters.Asisoftenthecase,theboundarybetweenthesetwoclassesisnotsharpandclear.Apondisanexampleofstandingwater.Butmostpondsar...