问题
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:1,1,8,16,7,21,4,16,2,()。A.10 B.20 C.30 D.40
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1,l,8,16,7,21,4,16,2,() A.10 B.20 C.30 D.40
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1/4 3/10 () 2/5 A.23/50 B.17/40 C.11/30 D.7/20
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1, 1, 8, 16, 7, 21, 4, 16, 2, ()A.10 B.20 C.30 D.40
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1,1,8,16,7,21,4,16,2,()。A.10 B.20 C.30 D.40
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[(9,6)42(7,7)][(7,3)40(6,4)][(8,2)()(3,2)] A.30 B.32 C.34 D.36