12,19,29,47,78,127,( )

恬恬2019-12-17  3

问题 12,19,29,47,78,127,( )

选项 A.199 B.235C.145 D.239

答案A

解析三级等差数列。[img]/upload/tiku/143/9548604_1.jpg[/img]
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