We can infer from the passage that one benefit of fluoride to healthy teeth is _______.
Đáp án A
Chúng ta có thể suy luận từ đoạn văn rằng một lợi ích của fluoride đối với sức khỏe răng miệng là gì?
A. Nó tăng cường men răng
B. Nó kích thích sản xuất nước bọt.
C. Làm cho răng trắng hơn
D. Nó là một chất thay thế cho việc đánh răng và dùng chỉ nha khoa chăm sóc răng.
Dẫn chứng: If fluoride is present in drinking water when teeth are forming, some fluoride is incorporated into the enamel of the teeth, making them more resistant to attack by acid. Fluoride toothpaste seems to act in another way, by promoting the remineralization of early carious lesions.
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