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--If a=3, b=4, what's the answer to the question a+2ab+1=?

--________.


  1. A.
    Twenty-eighth
  2. B.
    Twenty-eight
  3. C.
    Thirteen
  4. D.
    Eighteen
B
考查數學計算。將a=3,b=4代入即可得出正確答案為B。本題容易。
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