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Which of the following statements is NOT considered the valid reason for the disappearance of black slavery in the American North in the early 1800s?

  • A.The price of slaves was too high.
  • B.Slavery was simply illegal in the North.
  • C.The Africans could not stand cold winters in the North.
  • D.As the North turned toward industry, mechanics and not farmhands were needed.
试题出自试卷《自考英语国家概况2012年4月真题及答案解析》
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