横向
1
Biological catalyst
4
Our home planet
6
Form of thermal energy
7
Smallest unit of an element
8
Gas essential for breathing
纵向
2
Unit of energy
3
Substance with pH above 7
5
Force that attracts objects together
9
Gas form of a liquid
Biological catalyst
Our home planet
Form of thermal energy
Smallest unit of an element
Gas essential for breathing
Unit of energy
Substance with pH above 7
Force that attracts objects together
Gas form of a liquid