横向
1
Disturbance that transfers energy
3
Compound containing oxygen
4
Form of thermal energy
7
Unit of power
纵向
2
Group of similar cells
4
Second lightest element
5
Our home planet
6
Smallest unit of an element
Disturbance that transfers energy
Compound containing oxygen
Form of thermal energy
Unit of power
Group of similar cells
Second lightest element
Our home planet
Smallest unit of an element