六、阅读表达。
We all know teeth are important in our life. We celebrate National Teeth-Loving Day on 20 September.
Do you know the life cycle of the teeth in your mouth? Children under 6 years old have 20 baby teeth. From 6 to 13, people lose their baby teeth one by one. Now permanent teeth(恒牙) begin to grow. Between the ages of 17 and 25, some people grow wisdom teeth(智齿). Of course, wisdom teeth don't make you any smarter. They look like a symbol(象征) of being grown-ups.
Do you know how to keep our teeth strong and healthy? Let's look at the following tips.
What we can do:
Brush your teeth at least twice a day: in the morning and before bedtime. Brush for at least two or three minutes every time.
Brush up and down on every tooth.
Use a dental floss(牙线) for your teeth to make them cleaner. Get a new toothbrush every three months.
What we can't do:
Don't eat too much candy or sweet food. Don't drink too much soda. Don't eat very hard food that can hurt your teeth.
Don't eat snacks before bedtime.
Teeth are important to everyone. Healthy teeth help us eat food to let us grow. They help us speak clearly. And yes, they help us look good.
根据短文内容回答问题(每小题答案不超过10个单词)。
1. When do we celebrate National Teeth-Loving Day?
2. How many baby teeth do children under 6 years old have?
3. Why do we need to use a dental floss?
4. How often should you get a new toothbrush?
5. How do you keep your teeth healthy in your daily life? (请自拟一句话作答)
We all know teeth are important in our life. We celebrate National Teeth-Loving Day on 20 September.
Do you know the life cycle of the teeth in your mouth? Children under 6 years old have 20 baby teeth. From 6 to 13, people lose their baby teeth one by one. Now permanent teeth(恒牙) begin to grow. Between the ages of 17 and 25, some people grow wisdom teeth(智齿). Of course, wisdom teeth don't make you any smarter. They look like a symbol(象征) of being grown-ups.
Do you know how to keep our teeth strong and healthy? Let's look at the following tips.
What we can do:
Brush your teeth at least twice a day: in the morning and before bedtime. Brush for at least two or three minutes every time.
Brush up and down on every tooth.
Use a dental floss(牙线) for your teeth to make them cleaner. Get a new toothbrush every three months.
What we can't do:
Don't eat too much candy or sweet food. Don't drink too much soda. Don't eat very hard food that can hurt your teeth.
Don't eat snacks before bedtime.
Teeth are important to everyone. Healthy teeth help us eat food to let us grow. They help us speak clearly. And yes, they help us look good.
根据短文内容回答问题(每小题答案不超过10个单词)。
1. When do we celebrate National Teeth-Loving Day?
On 20 September.
2. How many baby teeth do children under 6 years old have?
Twenty. /20.
3. Why do we need to use a dental floss?
To make teeth cleaner.
4. How often should you get a new toothbrush?
Every three months.
5. How do you keep your teeth healthy in your daily life? (请自拟一句话作答)
Brush teeth twice a day.
答案：1. On 20 September.
2. Twenty. /20.
3. To make teeth cleaner.
4. Every three months.
5. Brush teeth twice a day.
2. Twenty. /20.
3. To make teeth cleaner.
4. Every three months.
5. Brush teeth twice a day.
解析：
【分析】
这是一道阅读理解细节查找类题目，解题时需先通读全文，再针对每个问题定位到原文对应语句，提取关键信息，同时严格遵守每小题答案不超过10个单词的要求，确保答案准确匹配原文内容。
【解析】
1. 定位原文第一段，明确提到全国爱牙日的时间为9月20日，直接提取对应内容；2. 定位原文第二段，找到6岁以下儿童的乳牙数量为20，提取即可；3. 定位原文“我们能做的事”中关于牙线的描述，明确使用牙线的目的是让牙齿更干净，提取该目的；4. 定位原文换牙刷的要求，找到更换频率为每三个月，提取对应内容；5. 从原文给出的护牙方法中选取符合要求的句子，如“每天刷两次牙”，符合字数要求。
【答案】
1. On 20 September.
2. Twenty. /20.
3. To make teeth cleaner.
4. Every three months.
5. Brush teeth twice a day.
【知识点】
阅读理解细节查找、信息提取
【点评】
本题为基础阅读理解细节题，侧重考查学生快速定位原文信息的能力，答案均来自原文，难度较低，学生易作答。
【难度系数】
0.9
这是一道阅读理解细节查找类题目，解题时需先通读全文，再针对每个问题定位到原文对应语句，提取关键信息，同时严格遵守每小题答案不超过10个单词的要求，确保答案准确匹配原文内容。
【解析】
1. 定位原文第一段，明确提到全国爱牙日的时间为9月20日，直接提取对应内容；2. 定位原文第二段，找到6岁以下儿童的乳牙数量为20，提取即可；3. 定位原文“我们能做的事”中关于牙线的描述，明确使用牙线的目的是让牙齿更干净，提取该目的；4. 定位原文换牙刷的要求，找到更换频率为每三个月，提取对应内容；5. 从原文给出的护牙方法中选取符合要求的句子，如“每天刷两次牙”，符合字数要求。
【答案】
1. On 20 September.
2. Twenty. /20.
3. To make teeth cleaner.
4. Every three months.
5. Brush teeth twice a day.
【知识点】
阅读理解细节查找、信息提取
【点评】
本题为基础阅读理解细节题，侧重考查学生快速定位原文信息的能力，答案均来自原文，难度较低，学生易作答。
【难度系数】
0.9