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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1489


30. In some countries, treatments for A(H1N1) flu were neither ________ nor effective, and many patients died because of infection.

A.critical B.scientific C.necessary D.Special
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30.Insomecountries,treatmentsf