横向
1
Preserved remains of ancient life
5
Unit of energy
6
Push or pull on an object
8
Second lightest element
纵向
2
Element found in all living things
3
Curved glass that refracts light
4
Center of an atom or cell
7
Mass per unit volume
Preserved remains of ancient life
Unit of energy
Push or pull on an object
Second lightest element
Element found in all living things
Curved glass that refracts light
Center of an atom or cell
Mass per unit volume