单项选择题
A.60 B.78.25(原文是78又4分之1) C.78.75 D.80
1/2,1/8,1/24,1/48,()A.1/96B.1/48C.1/64D.1/81
单项选择题1/2,1/8,1/24,1/48,()
A.1/96 B.1/48 C.1/64 D.1/81
1,3,2,6,11,19,()A.8B.11C.30D.36
单项选择题1,3,2,6,11,19,()
A.8 B.11 C.30 D.36
18,4,12,9,9,20,(),43A.8B.11C.30D.9
单项选择题18,4,12,9,9,20,(),43
A.8 B.11 C.30 D.9