横向
1
Chemical element in table salt
4
Our home planet
5
Fourth state of matter
纵向
2
The Red Planet
3
Center of an atom or cell
6
Molten rock beneath Earth surface
7
Compound containing oxygen
8
Unit of electric potential
Chemical element in table salt
Our home planet
Fourth state of matter
The Red Planet
Center of an atom or cell
Molten rock beneath Earth surface
Compound containing oxygen
Unit of electric potential