找规律 3/1 6/3 9/6 12/10 ( ) ( ) 5/4 5/2 5/1 10/1 ( ) ( )
问题描述:
找规律 3/1 6/3 9/6 12/10 ( ) ( ) 5/4 5/2 5/1 10/1 ( ) ( )
答
15/15
20/1