A.65
B.70
C.74
D.79
[单选题]-3,5,7,4,14,18,( )A.29B.23C.21D.17
[主观题]计算。4/3-(2/5+3/10)5/7+1/4-9/143/4+3/6-5/8
[主观题]计算。5/12+1/12=14/15-4/15=3/7-3/7=3/8+3/8=3/10+1/10=5/8-1/8=
[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]12,2,2,3,14,2,7,1,18,3,2,3,40,10,( ),4A.4B.2C.3D.1
[单选题]12,2,2,3,14,2,7,1,18,3,2,3,40,10,( ),4。A.4B.2C.3D.1
[单选题]2,5,1,12,3,2,2,14,2,1,7,36,4,( ),3A.1B.2C.3D.4
[单选题]-3/7,3/14,-1/7,3/28,()A .3/35B .-3/35C .-3/56D .3/56
[单选题]采用某种进位制时,如果4*5=14,那么7*3=()A . 15B . 21C . 20D . 16
[单选题]1 1 3 7 17 41 ( )A.89 B.99 C.109 D.119