1,2,1,6,9,10,( )A.13B.12C.19D.17
1,2,1,6,9,10,( )
A.13
B.12
C.19
D.17
相关考题:
第五组的频率是( )。A.10%B.12%C.15%D.17%
1,2,1,6,9,10,( )
A.13
B.12
C.19
D.17