横向
1
Nerve cell in the brain
5
Amplified beam of light
7
Substance with pH above 7
8
Naturally occurring inorganic solid
10
Unit of energy
11
Infectious microscopic agent
12
Ball of burning gas in space
纵向
2
Preserved remains of ancient life
3
Unit of heredity
4
Center of an atom or cell
6
Solid with repeating atomic pattern
9
Path of a planet around the sun
13
Push or pull on an object