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If a and b are integers such that a + b = 5, which of the following is true?

I. The product of a and b is odd.

II. If a is odd, b is even.

III. If a is negative, b is positive.
  • AI only
  • BII only
  • CI and II
  • DII and III
  • EI, II and III
显示答案
正确答案: D

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