:2/3,4/9,6/27,( )A.1/9B.8/81C.10/81D.12/81

:2/3,4/9,6/27,( )

A.1/9

B.8/81

C.10/81

D.12/81


相关考题:

2/3,4/9,6/27,( )A.1/9B.8/81C.10/81D.12/81

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