横向
1
Part of a line with two endpoints
4
U-shaped curve of a quadratic function
6
Amount of space an object occupies
7
Number divisible only by 1 and itself
纵向
2
Repeated addition
3
Divisible by two
5
Power to which a number is raised
8
Visual representation of data
9
Line segment connecting two circle points
10
Comparison of two quantities
11
The number representing nothing
12
Reference line in a graph