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Trắc nghiệm: Drying food by means of solar energy is an ancient process applying wherever climatic conditions make it possible,Drying food by means of solar energy is an ancient process applying wherever climatic conditions make it possible.

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Drying food by means of solar energy is an ancient process applying wherever climatic conditions make it possible, Drying food by means of solar energy is an ancient process applying wherever climatic conditions make it possible.

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