横向
1
Infectious microscopic agent
3
Second lightest element
5
Path of a planet around the sun
8
Our home planet
纵向
2
The Red Planet
4
Absolute temperature scale unit
6
Mass per unit volume
7
Push or pull on an object
Infectious microscopic agent
Second lightest element
Path of a planet around the sun
Our home planet
The Red Planet
Absolute temperature scale unit
Mass per unit volume
Push or pull on an object