A.224/56
B.14/32
C.20/48
D.16/40
[单选题]2/5,3/7,4/10,6/14,8/20,12/28,( )。A.224/56B.14/32C.20/48D.16/40
[单选题]2/5, 3/7, 4/10, 6/14, 8/20, 12/28, ( )A.224/56B.14/32C.20/48D.16/40
[单选题]2/5, 3/7, 4/10, 6/14, 8/20, 12/28, ( )A.224/56B.14/32C.20/48D.16/40
[单选题]7,8,9,10,12,14,16,20,21,28,( )A.35B.32C.28D.27
[单选题]2 4 ? 5 7 8 15 6 14A.1B.4C.5D.12
[单选题]1,10,2,,3,8,4,7,5,6A.6 B.7 C.8 D.91,10,2, ,3,8,4,7,5,6A.6 B.7 C.8 D.9
[主观题]计算。3/7+4/5=5/12+5/8=7/9+6/7=1-2/7-3/7=1/4+1/6+3/4=1/2-1/6=
[单选题]:6,10,7,12,8,14,( ),( )A.9.16B.9,13C.10,11D.11,14
[单选题]1,10,2,( ),3,8,4,7,5,6。A.6B.7C.8D.9
[单选题]1,10,2,( ),3,8,4,7,5,6。A.6B.7C.8D.9