横向
1
Naturally occurring inorganic solid
5
Element found in all living things
6
Tissue that contracts for movement
纵向
2
Icy body with a tail near the sun
3
Substance with pH below 7
4
Hottest planet in solar system
5
Reddish electrical conductor
7
Solid with repeating atomic pattern
8
Second lightest element
9
Preserved remains of ancient life