问题
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5,6,19,17,(),-55 A.15;B.344;C.343;D.11;
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1,1/2 , 6/11 ,17/29 , 23/38 ,()A.28/45 B.117/191 C.31/47 D.122/199
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6,11,17,(),45A.22 B.25 C.28 D.30
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28 7 7 6 9 9 8 8 () 5 13 16 A.5 B.17 C.19 D.47
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1,2,5,3,6,-1,11,4,17,-5,()A.9B.14C.28D.19
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1 1/2 6/11 17/29 23/38 ( )A.28/45 B.117/191
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