横向
1
Infectious microscopic agent
3
Nerve cell in the brain
6
Measure of matter in an object
7
Ball of burning gas in space
纵向
1
Gas form of a liquid
2
Amplified beam of light
3
Center of an atom or cell
4
Mass per unit volume
5
Element found in all living things
8
Reddish electrical conductor
9
Smallest unit of an element