What are the missing numbers in the last diamond in the sequence below?

admin2019-03-19  43

问题 What are the missing numbers in the last diamond in the sequence below?

选项 A、 
B、 
C、 
D、 

答案C

解析 由上图可看出,上面几个分式分子分母加起来的值均为31,利用排除法可知选项C正确。
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