问题
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15,5,3,5/3,______ () A.9/5 B.27/5 C.15/9 D.9/15
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1/16,1/27,1/16,1/5,______,7 () A.1/16 B.1 C.2 D.1/24
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3, 2 ,11 ,14, 27,______ () A.30 B.32 C.34 D.36
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1,3/4,9/5,7/16,25/9,______ () A.15/38 B.11/36 C.14/27 D.18/29
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2,10,17,23,______ ,32 A.25 B.26 C.27 D.28
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18,24,21,27,24,30,______ A.19 B.22 C.25 D.27