单项选择题
1.2,1.3,2.6,6.11,24.18,:()
A.25.20 B.120.27 C.32.30 D.36.27
单项选择题 1/3,2/5,4/9,(),16/23,32/33
单项选择题 4,3,1,12,9,3,17,5,:()
单项选择题 1,2,5,3,6,-1,11,4,17,-5,:()