横向
1
Basic unit of life
4
Naturally occurring inorganic solid
6
Biological catalyst
7
Form of thermal energy
纵向
2
Compound containing oxygen
3
Second lightest element
5
Force that attracts objects together
8
Fourth state of matter
Basic unit of life
Naturally occurring inorganic solid
Biological catalyst
Form of thermal energy
Compound containing oxygen
Second lightest element
Force that attracts objects together
Fourth state of matter