单项选择题
19/13,1,13/19,10/22,( )A.7/24B.7/25C.5/26D.7/26
单项选择题19/13,1,13/19,10/22,( )
99,110,122,135,( )A.149B.150C.151D.148
单项选择题99,110,122,135,( )
1 1/3 1/12 1/60 ( )A.1/250B.1/360C.1/720D.1/240
单项选择题1 1/3 1/12 1/60 ( )