:1,2,6,24,120,()
A.720
B.600
C.480
D.240
1,1,2,6,24,() A,25;B,27;C,120;D,125
1 1 2 6 24() A.11 B.50 C.80 D.120
1,-2,6,-24,() A.72 B.96 C.120 D.-120
1,2,6,24,120,() A.720B.600C.480 D.240
1,1,2,6,24,120, ()。A.620B.720C.820D.680