A.33
B.31
C.27
D.25
[单选题]1, 1, 5, 3, 9, 9, 13, 27, ( ), ( )。
[单选题]1,1,3,3,7,5,13,7,21,( )。A.9B.11C.8D.22
[主观题]1,1,5,3,9,9,13,27,(),()A.17,81B.16,54C.15,36D.14,42
[主观题]填空。1/3+7/13=()5/7-2/7=()()-1/12=11/127/5-()=3/5
[单选题]:1, 3, 3, 5, 7, 9, 13, 15, ( ), ( )。A.19,21B.19,23C.2l,23D.27,30
[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
[试题]计算:(1)27-18+(-7)-32(2)1/3+(-1/5)-1+2/3(3)0.5+(-1/4)-(-2.75)+1/2 (4)(-2/3)+(-1/6)-(-1/4)-1/2
[单选题]1, 9, 7, 27, 13, ( ), 19, 63A.25 B.33 C.45 D.54
[单选题]1 1 5 7 13 ( )A . 15B . 17C . 19D . 21