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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
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Flu is a very ______ infectious disease. Fever, headaches, coughing and fatigue are some of its ______ symptoms.

A.normal; common B.usual; ordinary C.common; usual D.ordinary; normal
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相关知识点

Fluisaveryinfectiousdisease.Fe