横向
1
Second lightest element
3
Unit of electric potential
5
Group of similar cells
7
Smallest unit of an element
8
Gas form of a liquid
纵向
2
Preserved remains of ancient life
4
Magnetic metallic element
6
Icy body with a tail near the sun
Second lightest element
Unit of electric potential
Group of similar cells
Smallest unit of an element
Gas form of a liquid
Preserved remains of ancient life
Magnetic metallic element
Icy body with a tail near the sun