横向
1
Our home planet
3
Compound containing oxygen
6
Group of similar cells
纵向
2
Force that attracts objects together
4
Unit of electric potential
5
Icy body with a tail near the sun
7
Positive particle in nucleus
8
Amplified beam of light
Our home planet
Compound containing oxygen
Group of similar cells
Force that attracts objects together
Unit of electric potential
Icy body with a tail near the sun
Positive particle in nucleus
Amplified beam of light