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  • 更新 2022-09-03
  • 科目 地理
  • 题型 选择题
  • 难度 容易
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---- Is there a vaccine _____ pig influenza?, I’m anxious to know.
----- Don’t worry, there is a vaccine _____ for pigs against pig influenza

A.for; available B.against ; use C.to; access D.against; available
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Isthereavaccinepiginfluenza?,I