1,2,1,6,9,10,( )
A.13;B.12;C.19;D.17;
1,2,1,6,9,10,() A.13;B.12;C.19;D.17;
:1,1,3,6,2,8,13,104,(),()。 A.13,169 B.11,176 C.9,81 D.7,48
1,3,0,6,10,9,()A.13 B.14 C.15 D.17
1,3,0,6,10,9,() A.13 B.14 C.15 D.17
17, 10, 9, 6, 1, 2, (. )。A.O B.1 C.2 D.3
1,2,1,6,9,10,()A.13B.12C.19 D.17