横向
1
Disturbance that transfers energy
3
Substance with pH below 7
5
Fourth state of matter
6
Mass per unit volume
纵向
2
Force that attracts objects together
4
Amplified beam of light
7
Nerve cell in the brain
8
Unit of power
Disturbance that transfers energy
Substance with pH below 7
Fourth state of matter
Mass per unit volume
Force that attracts objects together
Amplified beam of light
Nerve cell in the brain
Unit of power