A.17,81 B.16,54 C.15,36 D.14,42
[单选题]1, 1, 5, 3, 9, 9, 13, 27, ( ), ( )。
[单选题]:1, 3, 3, 5, 7, 9, 13, 15, ( ), ( )。A.19,21B.19,23C.2l,23D.27,30
[单选题]:1,4/3,13/9,40/27,()。A.121/81 B.67/81 C.121/51 D.67/51
[单选题]1,4/3,13/9,40/27,()。A.121/81 B.67/81 C.121/51 D.67/51
[单选题]:1,3,3,5,7,9,13,15,( ),( )。A.19,21 B.19,23 C.21,23 D.27,30
[单选题]1,3,3,5,7,9,13,15(),()A . A:19,21B . B:19,23C . C:21,23D . D:27,30
[单选题]1, 9, 7, 27, 13, ( ), 19, 63A.25 B.33 C.45 D.54
[试题]1/9,2/27,1/27,()A,4/27;B,7/9;C,5/18;D,4/243;
[单选题]1,3,3,9,27,( )A.251B.243C.223D.143
[单选题]1,9,7,27,13,( ),19,63A.25B.33C.45D.54