横向
1
Nerve cell in the brain
3
Substance with pH above 7
6
Ball of burning gas in space
7
Mass per unit volume
9
Unit of energy
10
Infectious microscopic agent
纵向
2
Disturbance that transfers energy
4
Element found in all living things
5
Compound containing oxygen
8
Group of similar cells
11
Curved glass that refracts light