题目内容
First degree burns are not serious and should be better within a day or two.
= First degree burns are not serious and should be better within _______ _______ ______ _______.
one or two days
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题目内容
First degree burns are not serious and should be better within a day or two.
= First degree burns are not serious and should be better within _______ _______ ______ _______.