横向
1
Unit of force
4
Substance with pH below 7
5
Mass per unit volume
纵向
1
Nerve cell in the brain
2
Chemical element in table salt
3
Tissue that contracts for movement
6
Basic unit of life
7
Path of a planet around the sun
Unit of force
Substance with pH below 7
Mass per unit volume
Nerve cell in the brain
Chemical element in table salt
Tissue that contracts for movement
Basic unit of life
Path of a planet around the sun