Question

What’s the strongest part of your body? Your head? Bones? It’s your teeth. There is a special thing called enamel（牙釉質(zhì)）in teeth. It is the hardest thing in the human body and keeps bacteria（細(xì)菌）away. However, teeth are hurt easily to problems and disease. September 20 is National Teeth-loving Day in China. Let’s pay attention to the health of our teeth.

Teeth problems are common around the world. Most children and young adults have tooth decay（齲齒）. A study which come out on China Health Monthly magazine this year showed that 40.74% of a sample（抽樣）of 1,306 Chinese students under age 15 has decayed teeth.

Food that is rich in sugar increases the risk of tooth decay. After you eat, bacteria go crazy over the sugar on your teeth. The bacteria turn sugar into acids that eat away at tooth enamel. This causes holes in your teeth.

Another common problem is crooked teeth（齙牙）. When your new teeth begin to grow and the old teeth haven’t fallen out, there isn’t enough space for the new ones. This causes crooked teeth.

Don’t worry. Here are some ways to keep your teeth healthy.

◆Brush at least twice a day in the morning and in the evening.

◆Learn to use dental floss(牙線). The floss gets rid of food that’s hidden where your toothbrush can’t get it.

◆Visit a dentist. He or she can check if you have any dental problems and help you clean your teeth.

◆Pay attention to what you eat. It’s better to eat lots of fruit and vegetables instead of fries and drink water instead of soda.

◆Wear braces(牙套) to make your teeth straight and beautiful.

1.What’s the strongest part in the human body according to the passage?

A. Bones. B. Teeth.

C. Head. D. Bactria.

2.When is National Teeth-loving Day in China?

A. September 30. B. October 20.

C. September 20. D. June 5.

3.Crooked teeth refer to（指的是） _________.

A. decayed teeth B. the old teeth

C. the fallen teeth D. the new teeth

4.Which of the following is NOT true about decayed teeth?

A. Once you eat sugar, you must have decayed teeth.

B. Bacteria become strong over the sugar on your teeth.

C. Bacteria can turn sugar into acids that eat away at tooth enamel.

D. If you have decayed teeth, there may be holes in those teeth.

5.Which of the following is NOT a good way to keep teeth healthy?

A. Make your teeth straight with braces.

B. Brush your teeth twice a day or more.

C. Eat much fries or drink much soda.

D. See a dentist if you have dental problems.

 

Answer 1

1.B

2.C

3.D

4.A

5.C

【解析】

試題分析：這篇短文給我們講述的是牙齒是我們身體上最結(jié)實的部分，但是我們的牙齒經(jīng)常會出現(xiàn)一些問題，如齲齒和齙牙等，因此作者在短文中給我們提供了一些保護(hù)牙齒的方法。

1.細(xì)節(jié)理解題。根據(jù)短文的開頭What’s the strongest part of your body? Your head? Bones? It’s your teeth.可知，作者告訴我們，我們身體上最結(jié)實的地方是牙齒。故選B。

2.細(xì)節(jié)理解題。根據(jù)短文第一段中September 20 is National Teeth-loving Day in China.可知，在中國9月20日是全國愛牙日。故選C。

3.細(xì)節(jié)理解題。根據(jù)短文中When your new teeth begin to grow and the old teeth haven’t fallen out, there isn’t enough space for the new ones. This causes crooked teeth.可知，當(dāng)新牙開始長，而舊的牙還沒有掉的時候，對新牙就沒有足夠的空間，因此就會形成齙牙。由此可知crooked teeth指的是新牙。故選D。

4.推理判斷題。根據(jù)短文中Food that is rich in sugar increases the risk of tooth decay.可知，富含糖的食物會提高患齲齒的危險，但這句話的意思并不是一定會患齲齒。故A不對。根據(jù)短文中bacteria go crazy over the sugar on your teeth.可知B說的是對的；根據(jù)The bacteria turn sugar into acids that eat away at tooth enamel可知C是對的；根據(jù)This causes holes in your teeth.可知D是對的。故應(yīng)該選A。

5.推理判斷題。根據(jù)Wear braces(牙套) to make your teeth straight and beautiful可知A是對的；根據(jù)Brush at least twice a day in the morning and in the evening可知B是對的；根據(jù)Visit a dentist.可知D是對的。根據(jù)It’s better to eat lots of fruit and vegetables instead of fries and drink water instead of soda可知C不對，故選C。

考點：健康保健類短文閱讀。