0, 9, 13, 130, 1703, ()。
A.221393
B.221394
C.221403
D.221405
:2,2,0,7,9,9,() A.13B.12C.18D.17
2,2,0,7,9,9,() A.13B.12C.18D.17
13, 9, 11, 6, 9, 3, (), () A.6, 0 B.-1, 1 C.7, 0 D.7, 6
0.1+0.3+0.5+0.7+0.9+0.1 1+0.13+0.15+0.17+0.19+0.21+?+0.99一().A.13.25 B.22.55 C.27.25
2,2,0,7,9,9,() A.13B.15C.18D.20
2,2,0,7,9,9,()A.13B.12C.18D.17