横向
1
Absolute temperature scale unit
4
Amplified beam of light
5
Naturally occurring inorganic solid
6
Substance with pH above 7
8
Unit of electric potential
12
Compound containing oxygen
纵向
2
Substance with pH below 7
3
Center of an atom or cell
7
Force that attracts objects together
9
Second lightest element
10
Smallest unit of an element
11
Tissue that contracts for movement