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3, 5, 7, 9, 13, 15, 21, 23, ()。A.29 B.31 C.33 D.35
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4,6,5,7,7,9,11,13,19,21,(),() A.27,29 B.32,33 C.35,37 D.41,43
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29,21,15,(),9 A.17B.11C.25D.7
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3,5,7,9,13,15,21,23,()。 A.29B.31C.33D.35
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29,21,15,(),9。 A.17 B.11 C.25 D.7
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4,5,7,9,13,15,()A.17B.19C.18 D.20
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4,5,7,9,13,15,()A.17B.19C.18D.20