单项选择题
34,35,69,104,173,________ ( )A.277B.298C.198D.278
单项选择题34,35,69,104,173,________ ( )
2/3,3/4,4/5,5/6,6/7,7/8,_________ ( )A.8/9B.7/10C.9/...
单项选择题2/3,3/4,4/5,5/6,6/7,7/8,_________ ( )