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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 2045

(上海卷38). Wind power is an ancient source of energy        we may return in the near future.

A.on which B.by which C.to which D.from which
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(上海卷38).Windpowerisanancientso