17,26,37,50,()。
A.63
B.61
C.67
D.65
2, 5, 10, 17, 26, () A.29 B.33 C.37 D.41
2,1,5,7,17,()A.26 B.31 C.32 D.37
5,17,37,65,()A.82 B.91 C.85 D.101
17 26 37 50 () A.63 B.61 C.67 D.65
5,17,37,65,() A.82 B.91 C.85 D.101