问题
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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
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设有字符序列(17,8,3,25,16,1,13,19,18,4,6,24),问新序列(6,8,3,4,16,1,13,17,18,19,25,14)是下
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设有字符序列(17,8,3,25,16,1,13,19,18,4,6,24),问新序列(6,8,3,4,16,1,13,17,18,19,25,14)是下
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计算:20+19-18-17+16+15 -14 - 13 + 12+11 …+4+3-2 - 1
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直接写出得数.30÷3=50÷5=90÷3=80÷8=36÷3=55÷5=96÷3=88÷8=42
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