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1,2,6,16,44,()A.66 B.84 C.88 D.120
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44 . 0 , 4, 16, 40, 80, ()A .160 B .128 C .136 D .140
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1,2,6,16,44,() A.66 B.84 C.88 D.120
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1,2,6,16,44,()() A.66 B.84 C.88 D.120
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1,2,6,16,44,() A.66 B.84 C.88 D.120
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1,2,6,16,44,() A.100B.120C.140D.160
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1,2,6,16,44, ()。A. 100B. 120C. 140D. 160