横向
1
Force that attracts objects together
3
Curved glass that refracts light
5
Substance with pH below 7
6
Tissue that contracts for movement
8
Disturbance that transfers energy
9
Push or pull on an object
纵向
2
Element found in all living things
3
Amplified beam of light
4
Solid with repeating atomic pattern
7
Naturally occurring inorganic solid