问题
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2,7,9,19,26,()。A. 28 B. 37 C. 41 D. 53
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2,11/3 ,28/5 ,53/7 ,86/9,()A.12 B.13 C. 123/11 D. 127/11
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13,19,11,22,(),25,7,()。A.15 26 B.25 24 C.16 18 D.9 28
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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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2,11/3 ,28/5 ,53/7 ,86/9,() A.12 B.13 C. 123/11 D. 127/11
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26,7,0,-1,-2,-9,()A.-18 B.-20 C.-26 D.-28