A.16/21
B.16/23
C.18/21
D.17/21
[单选题]1/3,4/7,7/11,2/3,13/19,()A.16/21B.16/23C.18/21D.17/21
[单选题]1/3,4/7 ,7/11 ,2/3 ,13/19 ,( )A. 16/21B. 16/23C. 18/21D. 17/21
[单选题]:2/13,4/11,2/3,8/7,2,( )。A.4/5B.4C.5/3D.3
[主观题]2/3,1/2,3/7,7/18,()A、4/11;B、5/12;C、7/15;D、3/16
[试题]2/3,1/2,3/7,7/18,()A.5/9;B.4/11;C.3/13;D.2/5
[单选题]2/3,1/2,3/7,7/18,()A .4/11B .5/12C .7/15D .3/16
[单选题]1 2 1 3 1 4 4 3 15 7 ? 13A.18 B.20 C.24 D.40
[单选题][(9,6),42,(7,7)],[(7,3),40,(6,4)],[(8,2),( ),(3,2)]。A.30B.32C.34D.36
[单选题][(9,6),42,(7,7)],[(7,3),40,(6,4)],[(8,2),( ),(3,2)]A.30B.32C.34D.36
[单选题][(9,6),42,(7,7)][(7,3),40,(6,4)][(8,2),( ),(3,2)]A.30B.32C.34D.36