横向
1
Hottest planet in solar system
4
Smallest unit of an element
5
Ball of burning gas in space
7
Unit of force
纵向
2
Tissue that contracts for movement
3
Group of similar cells
6
Element found in all living things
8
Unit of energy
Hottest planet in solar system
Smallest unit of an element
Ball of burning gas in space
Unit of force
Tissue that contracts for movement
Group of similar cells
Element found in all living things
Unit of energy