1 , 2/3 , 5/9 , ( ) , 7/15 , 4/9 , 4/9

admin2020-12-24  6

问题 1 , 2/3 , 5/9 , (  ) , 7/15 , 4/9 , 4/9

选项

答案12分之6

解析解析:3/3 , 4/6 , 5/9 , (6/12) , 7/15 , 8/18
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