横向
1
Unit of heredity
4
Push or pull on an object
5
Molten rock beneath Earth surface
6
Smallest unit of an element
8
Mass per unit volume
纵向
2
Our home planet
3
Gas essential for breathing
7
Biological catalyst
Unit of heredity
Push or pull on an object
Molten rock beneath Earth surface
Smallest unit of an element
Mass per unit volume
Our home planet
Gas essential for breathing
Biological catalyst