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:3,4,7,16,43,()。A.62 B.63 C.124 D.126
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1/3,4/7 ,7/11 ,2/3 ,13/19 ,()A. 16/21 B. 16/23 C. 18/21 D. 17/21
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3,4,7,16,() A.23 B.27 C.39 D.43
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3,4,7,16,43,()。A.62 B.63 C.124 D.126
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3,4,7,16,() A.23B.27C.39D.43
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2,4,3,(),13/4,27/8,53/16。A.1 B.7/2 C.7/3 D.4
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3 4 7 16 ( ) 。 A. 23 B. 27 C. 39 D. 43