横向
1
Icy body with a tail near the sun
3
Second lightest element
5
Gas essential for breathing
6
Measure of matter in an object
纵向
2
Mass per unit volume
4
Element found in all living things
5
Path of a planet around the sun
7
Unit of force
Icy body with a tail near the sun
Second lightest element
Gas essential for breathing
Measure of matter in an object
Mass per unit volume
Element found in all living things
Path of a planet around the sun
Unit of force