横向
1
Preserved remains of ancient life
4
Naturally occurring inorganic solid
6
Nerve cell in the brain
纵向
2
Hottest planet in solar system
3
Second lightest element
5
Fourth state of matter
7
Basic unit of life
8
Compound containing oxygen
Preserved remains of ancient life
Naturally occurring inorganic solid
Nerve cell in the brain
Hottest planet in solar system
Second lightest element
Fourth state of matter
Basic unit of life
Compound containing oxygen