A.-18 B.-20 C.-25 D.-27
[单选题]-1,-1,-4,-6,-15,( )。[北京2010年真题]A.-18B.-20C.-25D.-27
[主观题]1,2,2,6,3,15,3,21,4,()A.46;B.20;C.12;D.44;
[单选题]1,2,2,6,3,15,3,21,4,()A . 46B . 20C . 12D . 44
[主观题]1/62/74/1511/187/100
[试题]1,1,2,6,15,()A.21;B.24;C.31;D.40;
[单选题]1,1,2,6,15,()A . 21B . 24C . 31D . 40
[单选题]1 2 1 3 1 4 4 3 15 7 ? 13A.18 B.20 C.24 D.40
[单选题]1,6,15,28,( )。A.36B.39C.42D.45
[主观题]1/21/31/41/61/12
[单选题]:1,8,9,4,( ),1/6。A.3B.2C.1D.1/3