问题
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16,27,16,(),1 A.5;B.6;C.7;D.8
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2/5,3/7,4/10,6/14,8/20,12/28,()A.224/56B.14/32C.20/48D.16/40
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2/5,3/7,4/10,6/14,8/20,12/28,() A.224/56B.14/32C.20/48D.16/40
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2/5, 3/7, 4/10, 6/14, 8/20, 12/28, () A.224/56 B.14/32 C.20/48 D.16/40
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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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16,27,16,(),1A.5 B.6 C.7 D.8