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    【题目】—If a＝6，b＝5，what's the answer to the question “a＋2ab＋1＝？”

    —________．

    A. Sixtyseven B. Fortyfive

    C. Twentythree D. One hundred

    【答案】A

    【解析】句意：如果a＝6，B＝5、算式“a＋2ab＋1＝？”- ________。本题采用推算法。计算6＋2×6×5＋1可得67。故选A。

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