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Câu hỏi:
What are nitrates used for?
- A. They preserve the color of meat
- B. They preserve flavor in package food
- C. The are objects of research
- D. They cause the animals become fatter
Lời giải tham khảo:
Đáp án đúng: A
Dẫn chứng:
That food is related to illness is not a new discovery. In 1945, government researchers realized that nitrates nitrites (commonly used to preserve color in meat) as well as other food additives caused cancer.
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