A.5/13 B7/13 C5/12 D7/12
[主观题]-1/2,1/2,-3/8,1/4,-5/32,()A..1/16B..3/32C..-1/36D..-1/64
[主观题]1/2,1/8,1/24,1/48,()A.1/96;B.1/48;C.1/64;D.1/81
[单选题]1/2,1/8,1/24,1/48,()A . 1/96B . 1/48C . 1/64D . 1/81
[单选题]1/2,1,7/8 ,5/8 ,13/32 ,( )A. 1/4B. 15/64C. 11/64D. 7/64
[试题]31.1/2,1/8,1/24,1/48,()A..1/24,B..1/36C..1/48D..1/96
[单选题]:1,1,3,6,2,8,13,104,(),()。A.13,169 B.11,176 C.9,81 D.7,48
[单选题]1,2,1/2,-3/4,-5/8,1/16,()A.11/32B.1/8C.1/4D.1/2
[主观题]填空。1/3+7/13=()5/7-2/7=()()-1/12=11/127/5-()=3/5
[单选题]1 21 31 44 315 7( ) 13A.18 B、20 C、24 D、40
[单选题]1/4,2/7,2/5,8/13,1( )A.9/16B.3C.32/19D.28/17