A.1/65
B.1/75
C.1/125
D.1/63
[单选题]:3/15,1/3,3/7,1/2,()。A.5/8 B.4/9 C.15/27 D.-3
[试题]3/15,1/3,3/7,1/2,()A.5/8B.4/9C.15/27D.-3
[单选题]3/15,1/3,3/7,1/2,( )A.5/8B.4/9C.15/27D.-3
[单选题]3/15,1/3,3/7,1/2,()。A.5/8 B.4/9 C.15/27 D.-3
[单选题]2/15,1/5,1/3,(),13/15,7/5,34/15。A. 25 B. 815 C. 35 D. 23
[单选题]2/3,1/2,5/9,( ),11/15。A.2/5B.6/11C.3/4D.7/12
[单选题]2/3,1/2,5/9,( ),11/15。A.2/5B.6/11C.3/4D.7/12
[单选题]2/3,1/2,5/9,( ),11/15。A.2/5B.6/11C.3/4D.7/12
[单选题]2/3,1/2,5/9,( ),11/15。A.2/5B.6/11C.3/4D.7/12
[单选题]2/3,1/2,5/9,( ),11/15。A.2/5B.6/11C.3/4D.7/12