横向
1
Second lightest element
4
Hottest planet in solar system
6
Icy body with a tail near the sun
7
Reddish electrical conductor
10
Smallest unit of an element
11
Infectious microscopic agent
纵向
2
Gas essential for breathing
3
The Red Planet
5
Our home planet
8
Ball of burning gas in space
9
Tissue that contracts for movement