A.18
B.20
C.25
D.28
[单选题]8,11,13,17,20,( )A.18B.20C.25D.28
[单选题]31 29 23 ( ) 17 13 11A.21 B. 20 C. 19 D. 18
[单选题]11,13,17,19,23,( )A.27B.29C.31D.33
[单选题]31,29,23,( ),17,13,11。A.21B.20C.19D.18
[单选题]7 11 13 17 19 31 47 41 ( )A.63 B.195 C.55 D.5
[单选题]4,11,6,13,8,( ),10。A.15B.16C.17D.18
[单选题]4,11,6,13,8,( ),10。A.15B.16C.17D.18
[单选题]4,11,6,13,8,( ),10。A.15B.16C.17D.18
[单选题]4,11,6,13,8,( ),10。A.15B.16C.17D.18
[单选题]4,11,6,13,8,( ),10。A.15B.16C.17D.18