1,1,2,6,24,()。
A.48
B.96
C.120
D.144
1/6,1/6,1/12,1/24,() A.1/48;B.1/28;C.1/40;D.1/2
:1,1,2,6,24,()。A.64B.78C.120D.136
0,6,24,(),120 A.48B.56C.60D.64
1/6,1/6,1/12,1/24,() A.1/48B.1/28C.1/40D.1/24
1,1,2,6,24,()A.48B.96 C.120D.122
2,4,6,36,8,64,10,()A.72B.100C.120D.144