横向
1
Unit of power
3
Unit of heredity
4
Center of an atom or cell
6
Reddish electrical conductor
7
Amplified beam of light
纵向
2
Ball of burning gas in space
3
Force that attracts objects together
5
Second lightest element
6
Basic unit of life
Unit of power
Unit of heredity
Center of an atom or cell
Reddish electrical conductor
Amplified beam of light
Ball of burning gas in space
Force that attracts objects together
Second lightest element
Basic unit of life