18,24,21,27,24,30,( ) A. 19B. 22C. 25D. 27

18,24,21,27,24,30,( )


A. 19
B. 22
C. 25
D. 27

参考解析

解析:解题指导: 原数列中的奇数项是以3为公差的等差数列,偶数项是以3为公差的等差数列。故答案选D。

相关考题:

18,24,21,27,24,30,A.19 B.22 C.25 D.27 18,24,21,27,24,30,A.19 B.22 C.25 D.27

18,24,21,27,24,30,______A.19 B.22 C.25 D.27