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4,5,7,9,13,15,()A.17 B.19 C.18 D.20
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4,5,7,9,13,15,______ () A.17 B.19 C.18 D.20
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2,2,0,7,9,9,() A.13B.15C.18D.20
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4,5,7,9,13,15,() A.17 B.19 C.18 D.20
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4,5,7,9,13,15,()A.17B.19C.18 D.20
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3,3,4,5,7,7,11,9,()A.13 B.16C.18D.17
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4,5,7,9,13,15, ()。A. 17B. 19C. 18D. 20