横向
1
Smallest unit of an element
4
Particle of light
5
Center of an atom or cell
8
Disturbance that transfers energy
9
Reddish electrical conductor
纵向
2
Nerve cell in the brain
3
The Red Planet
6
Mass per unit volume
7
Gas essential for breathing
Smallest unit of an element
Particle of light
Center of an atom or cell
Disturbance that transfers energy
Reddish electrical conductor
Nerve cell in the brain
The Red Planet
Mass per unit volume
Gas essential for breathing