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

—________．

A. Sixty?seven B. Forty?five

C. Twenty?three D. One hundred

A 【解析】句意：如果a＝6，B＝5、算式“a＋2ab＋1＝？”- ________。本題采用推算法。計(jì)算6＋2×6×5＋1可得67。故選A。
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