横向
1
Compound containing oxygen
3
Positive particle in nucleus
8
Icy body with a tail near the sun
10
Ball of burning gas in space
纵向
2
Nerve cell in the brain
4
Substance with pH above 7
5
Unit of power
6
Substance with pH below 7
7
Force that attracts objects together
9
Precious yellow metallic element
11
The Red Planet