单项选择题
3, 5, 8, 13, 21, ( )A.34B.35C.38D.42
单项选择题3, 5, 8, 13, 21, ( )
103,204,305,406,( ),608A.705B.907C.307D.507
单项选择题103,204,305,406,( ),608
1/2,2/3,3/4,( )A.1/5B.5/6C.3/7D.4/5
单项选择题1/2,2/3,3/4,( )