单项选择题
A.13 B.12 C.19 D.17
2,2,8,38,()A.76B.81C.144D.182
单项选择题2,2,8,38,()
A.76 B.81 C.144 D.182
1,5,19,49,109,()A.170B.180C.190D.200
单项选择题1,5,19,49,109,()
A.170 B.180 C.190 D.200
4/9,1,4/3,(),12,36A.2/3B.2C.3D.6
单项选择题4/9,1,4/3,(),12,36
A.2/3 B.2 C.3 D.6