问题
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1,3,4,6,11,19,() A.57;B.34;C.22;D.27;
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:1/2,3/2,5/6,11/30,()。A.29/64 B.40/57 C.41/330 D.108/119
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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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1/2,3/2,5/6,11/30,()。A.29/64 B.40/57 C.41/330 D.108/119
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1.11, 2.23, 3.35,4.47, (), 6.71。 A.5.57B.5.58C.5.59 D.5.60
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1,3,2,4,2,7,4,11,(),()。A.6,19 B.8,18 C.10,20 D.16,22