Câu hỏi:
03/04/2023 151Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
The cause of tooth decay is acid, which is produced by bacteria in the mouth. The acid removes minerals from tooth enamel, allowing tooth decay to begin; the saliva in your mouth encourages remineralization and neutralizes the acid. The rate at which bacteria in the mouth produce acid depends on the amount of plaque on the teeth, the composition of the microbial flora, and whether the bacteria of the plaque have been "primed" by frequent exposure to sugar. To keep your teeth healthy, a regular dental hygiene program should be followed.Removing plaque with a toothbrush and dental floss temporarily reduces the numbers of bacteria in the mouth and thus reduces tooth decay. It also makes the surfaces of the teeth more accessible, enabling saliva to neutralize acid and remineralize lesions. 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.In addition to a regular dental hygiene program, a good way to keep your teeth healthy is to reduce your intake of sweet food. The least cavity-causing way to eat sweets is to have them with meals and not between. The number of times you eat sweets rather than the total amount determines how much harmful acid the bacteria in your saliva produce. But the amount of sweets influences the quality of your saliva. Avoid, if you can, sticky sweets that stay in your mouth a long time. Also try to brush and floss your teeth after eating sugary foods. Even rinsing your mouth with water is effective.Whenever possible, eat foods with fiber, such as raw carrot sticks, apples, celery sticks, etc., that scrape off plaque, acting as a toothbrush. Cavities can be greatly reduced if these rules are followed when eating sweets.
What does this passage mainly discuss?
Đáp án chính xác
Câu hỏi trong đề:
Trắc nghiệm tổng hợp Tiếng anh có đáp án 2023 !!
Sách mới 2k7: Tổng ôn Toán, Lí, Hóa, Văn, Sử, Địa…. kỳ thi tốt nghiệp THPT Quốc gia 2025, đánh giá năng lực (chỉ từ 110k).
Quảng cáo
Trả lời:
Giải bởi Vietjack
Phần này chủ yếu thảo luận về các cách để giữ cho răng của bạn khỏe mạnh.
Chọn C
Nhà sách VIETJACK:
CÂU HỎI HOT CÙNG CHỦ ĐỀ
Câu 1:
He got down to writing the letter as soon as he returned from his walk.
He got down to writing the letter as soon as he returned from his walk.
Xem đáp án »
03/04/2023
28,378
Câu 2:
The outcome of the election was never in doubt. => At no time …
The outcome of the election was never in doubt. => At no time …
Xem đáp án »
13/07/2024
14,618
Câu 3:
I prefer going out for a meal to staying at home. ⇒ I'd rather........
Xem đáp án »
13/07/2024
13,965
Câu 4:
If you still want to maintain this relationship, you ____ behave improperly like that.
If you still want to maintain this relationship, you ____ behave improperly like that.
Xem đáp án »
03/04/2023
11,111
Câu 5:
The only reason the party was a success was that a famous film star attended.
The only reason the party was a success was that a famous film star attended.
Xem đáp án »
03/04/2023
9,792
Câu 6:
Give a suitable preposition:
In the UK, poor air quality is responsible _______ some 40,000 deaths each year.
Give a suitable preposition:
In the UK, poor air quality is responsible _______ some 40,000 deaths each year.
Xem đáp án »
13/07/2024
8,924
Câu 7:
They started, as _______ gatherings but they have become increasingly formalized in the last few years.
They started, as _______ gatherings but they have become increasingly formalized in the last few years.
Xem đáp án »
03/04/2023
8,894
về câu hỏi!