横向
1
Infectious microscopic agent
4
Basic unit of life
5
Our home planet
6
Curved glass that refracts light
7
Blocking of light by a celestial body
11
Hottest planet in solar system
纵向
2
Group of similar cells
3
Fourth state of matter
8
Naturally occurring inorganic solid
9
Unit of force
10
Center of an atom or cell
12
Unit of energy
13
Precious yellow metallic element