What's the difference between powder and flour? Mainly explained from raw materials and processing What's the difference between flour and flour? Mainly explained from raw materials and processing

What's the difference between powder and flour? Mainly explained from raw materials and processing What's the difference between flour and flour? Mainly explained from raw materials and processing

The people upstairs felt dizzy.
Noodles were made from flour and water. They were raw.
The powder was prepared by adding water to the rice and heating it. It was cooked.
The noodles could be boiled in boiling water. It was best to soak the flour in water for 30 seconds.

Those upstairs are dizzy.
Noodles are made of flour and water, raw.
Powder is cooked by adding water to rice and then heating it.
The noodles can be boiled directly in boiling water. It is better to soak the flour in water first.

What is the law between the number of vertices, edges, and faces of a solid figure The formula and why?

In this paper, we prove Euler's formula and Euler's formula by means of topological method. For any polyhedron (i.e., a solid in which surface is a plane polygon and has no hole), suppose that F, E and V represent the number of surfaces, edges (or edges), angles (or tops) respectively, then F-E+V=2. Try to prove the surface, edges and vertices of polyhedron by means of topological method.

In this paper, we prove Euler's formula and Euler's formula by means of topological method. For any polyhedron (i.e., a solid in which each surface is a plane polygon and has no hole), suppose that F, E and V represent the number of surfaces, edges (or edges), angles (or tops) respectively, then F-E+V=2. Try to prove the surface, edges and vertices of polyhedron by means of topological method.