1,4,11,30,85,()
A.248
B.250
C.256
D.260
1,4,ll,30,85,()A.248 B.250 C.256 D.260
1,4,11,30,85,()A.248 B.250 C.256 D.260
1,4,11,30,85,() A.248 B.250 C.256 D.260
1,4,11,30,85,() A.248 B.250 C.256 D.260
方案1的期望收益值为()万元。A.248B.255C.260D.648