横向
1
Force that attracts objects together
3
Center of an atom or cell
7
Group of similar cells
8
Hottest planet in solar system
纵向
2
Preserved remains of ancient life
4
Second lightest element
5
Mass per unit volume
6
Tectonic landmass section
Force that attracts objects together
Center of an atom or cell
Group of similar cells
Hottest planet in solar system
Preserved remains of ancient life
Second lightest element
Mass per unit volume
Tectonic landmass section