2019-2020
1 6N 8N
A1N B 5N C 20N D 0
2 F
2
AF/2 B2F CF/4 D4F
3 PQ
P Q Q PQ
A.Q
B.Q
C.
D.
4 , AB C, F A,ABC
,
A A B C
C C DCB
5 4m 1m
A4m1m B 4m 1m C 4 m3m D 4 m 3m
6 ( )
A
B
C
D
7
x1x2x3x4
