横向
1
Nerve cell in the brain
6
Group of similar cells
7
Unit of electric potential
9
Infectious microscopic agent
10
Form of thermal energy
12
Precious yellow metallic element
纵向
2
Path of a planet around the sun
3
Our home planet
4
Positive particle in nucleus
5
Unit of heredity
8
Gas essential for breathing
11
Push or pull on an object