横向
1
Particle of light
3
Gas form of a liquid
4
Group of similar cells
5
Form of thermal energy
7
Element found in all living things
纵向
2
Smallest unit of an element
3
Hottest planet in solar system
6
Nerve cell in the brain
8
Biological catalyst
Particle of light
Gas form of a liquid
Group of similar cells
Form of thermal energy
Element found in all living things
Smallest unit of an element
Hottest planet in solar system
Nerve cell in the brain
Biological catalyst