横向
1
Precious yellow metallic element
3
Group of similar cells
6
Element found in all living things
7
Gas essential for breathing
纵向
2
Second lightest element
4
Path of a planet around the sun
5
Magnetic metallic element
8
Unit of heredity
Precious yellow metallic element
Group of similar cells
Element found in all living things
Gas essential for breathing
Second lightest element
Path of a planet around the sun
Magnetic metallic element
Unit of heredity