Question

Do you love cheese? If you do, this new survey will make you happy. According to the survey, cheese is good for teeth and can protect people from getting cavities (蛀牙) . The survey is made by a group of scientists from the Academy of General Dentistry, an organization from the USA. The scientists find that eating cheese can make the mouth’s PH rise. And the higher the mouth’s PH is, the less likely it is that a person gets cavities. That’s why cheese is good for tooth health.

In order to do the survey, the scientists invited 68 children between 12-15 years old to join the test. They tested the mouth’s PH of the children at first. Then they divided the children into three groups. One group of children ate some cheese, another group of children ate sugar-free yoghurt and the last group of children drank a glass of milk. After that, the scientists tested the mouth’s PH of all the children for several times.

The scientists found that the mouth’s PH of the last two groups of children didn’t change, but the mouth’s PH of children from the first group rose greatly. Besides, the scientists also found that cheese could create a protective layer (保护层) on teeth. The layer could protect the teeth from getting hurt by many bad things.

Information Card

The thing that is good for teeth	1.___________________
The people who did the survey	2.___________________
The people who joined the test	3.__________________
The thing that the scientists test	4.___________________
The thing that the protective layer can do	5.___________________

Answer

1.Cheese

2.A group of scientists

3.children

4.The mouth’s PH

5.Protecting the teeth from getting hurt

【解析】

试题分析：这篇短文主要讲述健康保健问题，文章介绍，科学家通过实验发现食用奶油可以对牙齿形成保护层，从而保护牙齿、防止蛀牙。

1.According to the survey, cheese is good for teeth and can protect people from getting cavities (蛀牙) 的描述可知，奶油对牙齿有好处。故填Cheese。

2.短文The survey is made by a group of scientists from the Academy of General Dentistry, an organization from the USA的描述可知，是美国的科学家做的这项调查。故可填A group of scientists。

3.细节理解题。根据短文In order to do the survey, the scientists invited 68 children between 12-15 years old to join the test的描述可知，是一群孩子参加了这项测试。故可填Children。

4.the scientists tested the mouth’s PH of all the children for several times的描述可知，科学家测试的是孩子口腔的PH值。故应填The mouth’s PH。

5.the layer could protect the teeth from getting hurt by many bad things的描述可知，保护层可以防止牙齿受到伤害。故可填Protecting the teeth from getting hurt。

考点：健康保健类短文阅读。