1/9,2/27,1/27,( )
A,4/27;B,7/9;C,5/18;D,4/243;
0,1/9,2/27,1/27, ()A.27 B.7/9 C.5/18 D.4/243
:3/15,1/3,3/7,1/2,()。A.5/8 B.4/9 C.15/27 D.-3
3/15,1/3,3/7,1/2,()A.5/8 B.4/9 C.15/27 D.-3
3/15,1/3,3/7,1/2,()。A.5/8 B.4/9 C.15/27 D.-3
0,1/9,2/27,1/27, () A.27 B.7/9 C.5/18 D.4/243
0,1/9,2/27,1/27,()。A.27B.7/9C.5/18D.4/243