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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1531

It is well-known to us all that knowledge is ____ treasure, but practice is ____ key to it.
A a, ∕    B a, the     C the, the    D∕ , the

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Itiswellknowntousallthatknowle