问题
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11,17,(),31,41,47 A. 19;B. 23;C. 27;D. 29;
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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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11,13,17,19,23,() A.27 B.29 C.31 D.33
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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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13, 17, 21, 25, (), 33。A.27 B.29 C.31 D.32
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13,17,21, 25,(),33。A.27 B.29 C.31 D.32