问题
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13,23,31,44,55,()。 A. 68 B. 62 C. 71 D. 43
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1,7,(),31,49,71 A.9 B.11 C.17 D.19
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3, 5, 7, 9, 13, 15, 21, 23, ()。A.29 B.31 C.33 D.35
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13, 23, 31, 44, 55, ()。A.68 B.62 C.71 D.43
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13, 23, 31, 44, 55, ()A.68 B.62 C.71 D.43
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-9.1,3.2,13.2,21.4,27.8,()。A.30.16B.39.72C.36.32 D.31.32
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