D只看底数4,9,16,27,46,(81)两两做差得5,7,11,19,(35)再作差2,4,8,(16),答案为9

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答案D

解析只看底数4,9,16,27,46,(81)两两做差得5,7,11,19,(35)再作差2,4,8,(16),答案为9
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