横向
1
Substance with pH above 7
3
Nerve cell in the brain
4
Group of similar cells
7
Gas essential for breathing
9
Mass per unit volume
10
Curved glass that refracts light
14
Blocking of light by a celestial body
纵向
2
Icy body with a tail near the sun
5
Unit of force
6
Push or pull on an object
8
Center of an atom or cell
11
Unit of electric potential
12
Biological catalyst
13
Unit of heredity