单项选择题
8,15,29,57,( )A.112B.114C.113D.116
单项选择题8,15,29,57,( )
2/3,8/9,4/3,2,( )A.3B.23/9C.25/9D.26/9
单项选择题2/3,8/9,4/3,2,( )
521,512,318,381,702,( )A.207,B.27C.720,D.270
单项选择题521,512,318,381,702,( )