横向
1
Smallest unit of an element
3
Absolute temperature scale unit
5
Push or pull on an object
纵向
1
Substance with pH below 7
2
Gas essential for breathing
4
Unit of force
6
Amplified beam of light
7
Second lightest element
Smallest unit of an element
Absolute temperature scale unit
Push or pull on an object
Substance with pH below 7
Gas essential for breathing
Unit of force
Amplified beam of light
Second lightest element