A.(15,45)
B.(16,49)
C.(16,51)
D.(15,49)
[单选题]4, 13, 22, 31, 45, 54, ( )A. 60,68B. 61,70C. 55,61D. 72,80
[试题]4,13,22,31,45,54,(),()A.60,68;B.55,61;C.63,72;D.72,80
[主观题]19/13,1,19/13,10/22,()a.7/24;b.7/25;c.5/26;d.7/26;
[单选题]1,4,7,10,13,( )A.14B.15C.16D.17
[主观题]4/17,7/13,10/9,()A.13/6;B.13/5;C.14/5;D.7/3;
[单选题]7,13,20,31,( )。A.40B.43C.51D.54
[单选题]3,7,13,21,31,( )。A.38B.41C.43D.49
[单选题]3,7,13,21,31,( )。A.38B.41C.43D.49
[单选题]3,7,13,21,31,( )。A.38B.41C.43D.49
[单选题]3,7,13,21,31,( )。A.38B.41C.43D.49