横向
1
Positive particle in nucleus
5
Substance with pH below 7
6
Unit of heredity
7
Smallest unit of an element
8
Basic unit of life
纵向
2
Gas form of a liquid
3
Mass per unit volume
4
Biological catalyst
8
Solid with repeating atomic pattern
Positive particle in nucleus
Substance with pH below 7
Unit of heredity
Smallest unit of an element
Basic unit of life
Gas form of a liquid
Mass per unit volume
Biological catalyst
Solid with repeating atomic pattern