横向
1
Smallest unit of an element
4
Push or pull on an object
6
Unit of force
7
Precious yellow metallic element
9
Chemical element in table salt
纵向
2
Unit of energy
3
Disturbance that transfers energy
5
Particle of light
8
Group of similar cells
Smallest unit of an element
Push or pull on an object
Unit of force
Precious yellow metallic element
Chemical element in table salt
Unit of energy
Disturbance that transfers energy
Particle of light
Group of similar cells