横向
1
Basic unit of life
3
Particle of light
4
Group of similar cells
8
Infectious microscopic agent
纵向
2
Center of an atom or cell
5
Compound containing oxygen
6
Preserved remains of ancient life
7
Element found in all living things
Basic unit of life
Particle of light
Group of similar cells
Infectious microscopic agent
Center of an atom or cell
Compound containing oxygen
Preserved remains of ancient life
Element found in all living things