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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较难
  • 浏览 1385

The development of industry has been ____ gradual process throughout ______human existence, from stone tools to modern technology.

A./, the B.the, a C.a, / D.a, a
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Thedevelopmentofindustryhasbee