横向
1
Unit of power
4
Substance with pH below 7
5
Our home planet
6
Hottest planet in solar system
7
Icy body with a tail near the sun
8
Biological catalyst
11
Curved glass that refracts light
纵向
2
Unit of force
3
Mass per unit volume
9
Positive particle in nucleus
10
Measure of matter in an object