横向
1
Unit of energy
4
Mass per unit volume
5
The Red Planet
6
Unit of force
7
Force that attracts objects together
纵向
2
Curved glass that refracts light
3
Biological catalyst
8
Positive particle in nucleus
Unit of energy
Mass per unit volume
The Red Planet
Unit of force
Force that attracts objects together
Curved glass that refracts light
Biological catalyst
Positive particle in nucleus