问题
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1/3,3/9,2/3,13/21,() A.17/27;B.17/26;C.19/27;D.
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1,3,13,15,27,29,35,()A.36 B.37 C.38 D.39
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13, 3, 36, -27, () A.135 B.100 C.55 D.3
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39,13,13/3,13/9,()。 A.2/3 B.13/27 C.27/13 D.1/2
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13, 3, 36, -27, () A.135B.100C.55 D.-3
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-9.1,3.2,13.2,21.4,27.8,()。A.30.16B.39.72C.36.32 D.31.32