30,60,91,123,156,( )A.180 B.185 C.188 D.190

30,60,91,123,156,( )

A.180
B.185
C.188
D.190

参考解析

解析:二级等差数列。

相关考题:

30,60,91,123,156,( )A.180B.185C.188D.190