横向
1
Gas essential for breathing
3
Naturally occurring inorganic solid
4
Path of a planet around the sun
8
Push or pull on an object
10
Magnetic metallic element
纵向
2
Unit of electric potential
3
Natural satellite of Earth
5
Substance with pH below 7
6
Chemical element in table salt
7
Compound containing oxygen
9
Substance with pH above 7