单项选择题
A.17/64 B.15/128 C.15/32 D.1/4
1/3,3/9,2/3,13/21,()A.17/27B.17/26C.19/27D.19/28
单项选择题1/3,3/9,2/3,13/21,()
A.17/27 B.17/26 C.19/27 D.19/28
0,9,26,65,124,()A.186B.217C.216D.215
单项选择题0,9,26,65,124,()
A.186 B.217 C.216 D.215
1,1,3,1,3,5,6,()A.1B.2C.4D.10
单项选择题1,1,3,1,3,5,6,()
A.1 B.2 C.4 D.10