横向
1
Particle of light
2
Force that attracts objects together
4
Center of an atom or cell
6
Path of a planet around the sun
7
Biological catalyst
纵向
2
Unit of heredity
3
Push or pull on an object
4
Unit of force
5
Chemical element in table salt
Particle of light
Force that attracts objects together
Center of an atom or cell
Path of a planet around the sun
Biological catalyst
Unit of heredity
Push or pull on an object
Unit of force
Chemical element in table salt