横向
1
Positive particle in nucleus
4
Infectious microscopic agent
5
Second lightest element
纵向
2
The Red Planet
3
Ball of burning gas in space
4
Hottest planet in solar system
6
Substance with pH above 7
7
Fourth state of matter
Positive particle in nucleus
Infectious microscopic agent
Second lightest element
The Red Planet
Ball of burning gas in space
Hottest planet in solar system
Substance with pH above 7
Fourth state of matter