A . 15
B . 18
C . 20
D . 30
[单选题]3,3,6,9,9,27,( )。A.18B.36C.24D.12
[单选题]3,3,6,9,9,27,( )。A.18B.36C.24D.12
[单选题]3,3,6,9,9,27,( )。A.18B.36C.24D.12
[单选题]3,3,6,9,9,27,( )。A.18B.36C.24D.12
[单选题]3,3,6,9,9,27,( )。A.18B.36C.24D.12
[单选题]3,3,6,9,9,27,( )。A.18B.36C.24D.12
[单选题]3,3,6,9,9,27,( )。A.18B.36C.24D.12
[单选题]3,3,6,9,9,27,( )。A.18B.36C.24D.12
[单选题]3,3,6,9,9,27,( )。A.18B.36C.24D.12
[单选题]3,3,6,9,9,27,( )。A.18B.36C.24D.12