横向
1
Substance with pH below 7
4
Solid with repeating atomic pattern
5
Gas form of a liquid
8
Infectious microscopic agent
纵向
2
Force that attracts objects together
3
Compound containing oxygen
6
Measure of matter in an object
7
The Red Planet
Substance with pH below 7
Solid with repeating atomic pattern
Gas form of a liquid
Infectious microscopic agent
Force that attracts objects together
Compound containing oxygen
Measure of matter in an object
The Red Planet