1/2 3/5 8/13 21/24 ( )A.38/81B.45/86C.55/ 89D.62/91
1/2 3/5 8/13 21/24 ( )
A.38/81
B.45/86
C.55/ 89
D.62/91
B.45/86
C.55/ 89
D.62/91
参考解析
解析:分子=前项分子+前项分母,分母=前项分母+分子;空缺项分子为21+34=(55),分母为 34+55=(89),
相关考题:
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