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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 1584

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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Insomecountries,treatmentsforA