A.21
B.20
C.19
D.18
[单选题]31 29 23 ( ) 17 13 11A.21 B. 20 C. 19 D. 18
[单选题]3,11,13,29,31,( )A. 52 B. 53 C. 54 D. 55
[单选题]11,13,17,19,23,( )A.27B.29C.31D.33
[单选题]7 11 13 17 19 31 47 41 ( )A.63 B.195 C.55 D.5
[单选题]1,1/2 , 6/11 ,17/29 , 23/38 ,( )A.28/45 B.117/191 C.31/47 D.122/199
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 2
[单选题]23 29 31 37 ( )A. 41 B. 40 C.43 D.45
11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
5 6 7 8 9 10 11 12 13 14-|||-15 16 17 18 19 20 21 22 23 24-|||-25 26 27 28 29 30