单选题:What would be the best title for the passage?

  • 题目分类:英语(一)
  • 题目类型:单选题
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题目内容:
What would be the best title for the passage? A.First device powered by walking will soon be on the marke
B.Advanced technology brings in a new way to operate heart pacemaker
C.Device gives new meaning to the idea of power walkin
D.Human energy will become a main source of electricit
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