【例题】0,1,5,23,119,( )
A.719 B.721 C.599 D.521
【例题】12,19,29,47,78,127,( )
A.199 B.235 C.145 D.239
【例题】1/2,1,4/3,19/12,( )
A.118/60 B.119/19 C.109/36 D.107/60
【例题】9,17,13,15,14,( )
A.13 B.14 C.13.5 D.14.5
【例题】1,3/4,9/5,7/16,25/9,( )
A.15/38 B.11/36 C.14/27 D.18/29