* You can stand on the Earth's surface: The Earth's surface is the outermost layer of our planet, which includes land, water, and ice. We are able to stand on this surface because of gravity, which pulls us towards the Earth's center.
* You cannot stand on "surface" as a general term: "Surface" is a more general term that can refer to the outside of any object. You can't stand on the "surface" of a table, for example, because it's not big enough or strong enough to support your weight.
So, while you can stand on the specific surface of the Earth, you cannot stand on any surface in general.