单项选择题
2 5 11 20 32 ( )A.43B.45C.47D.49
单项选择题2 5 11 20 32 ( )
18,5,16,5,14,5,( ),( )A.13,5B.12,5C.11,5D.10,5
单项选择题18,5,16,5,14,5,( ),( )