题型:阅读选择 题类: 难易度:普通
广东省深圳市坪山区2024-2025学年九年级上学期11月期中考试英语试题
When you have a cold drink in summer, you may get a toothache. If eating ice cream or drinking cold drinks make your eh hurt, it could be a kind of protein(蛋白质) called TRPC5 at work.
A new study which came out on March 26 answered a long-lasting question about our teeth—why do cold food and drinks make our teeth hurt? Actually, when you feel a toothache, it's because a kind of protein feels a drop in temperature and sounds an alarm to your brain. The research team found this protein 15 years ago. But they didn't know where in the body it felt the temperature. Now they know it—it's in a kind of tooth cell.
David Clapham from the research team explained how our teeth sensed cold. When someone is eating ice cream, for example, cells with TRPC5 in teeth feel a change in temperature and send a signal to the brain. As a result, you will be sensitive to the cold food and feel pains. I is also found that here will be more TRPC5 if your teeth are worn away(磨损), so a great way to prevent a toothache is to treat it gently. If you don't know what to do, the following tips can help you out;
●Don't brush your teeth too hard. Brush up and down to keep them clean and strong.
●Say goodbye to soda and sticky candy, because they can wear your teeth away.
●Stop grinding(磨) your teeth. That will make your teeth more sensitive(敏感的) to coldness.
If all of these don't work, go to the dentist!
A. Really? B. What about you? C. Maybe next time. D. The park near your home? E. Have a good time. F. Would you like to go with us? |
Tom: What's your plan tomorrow, Ann?
Ann: I'll stay at home.{#blank#}1{#/blank#}
Tom: I will have a picnic in a park with some friends.
Ann: {#blank#}2{#/blank#}
Tom: No. We'll go to Zhongshan Park.
Ann: Have you checked the weather report?
Tom: Yes. It'll be sunny.{#blank#}3{#/blank#}
Ann: I'd love to, but I have to finish a school report.
Tom: What a pity! {#blank#}4{#/blank#}
Ann: OK.{#blank#}5{#/blank#}
Tom: Thank you.
English Study Assessment(评价) Grade:8 Name: Amy Total: 35★ |
Self-assessment |
Listening skill: ◎I can understand the teacher and finish the listening tasks in class.(★★★★) |
Speaking skill: ◎I can show myself in English. (★★★★) ◎I can answer the questions loudly and clearly.(★★★★) |
Reading skill: ◎I can find out the main ideas of passages quickly.(★★★★) ◎I can read English newspapers and magazines fit for Grade 8 students.(★★★) |
Writing skill: ◎I can write something in English correctly.(★★★) ◎I can try to write passages according to exampies.(★★★★) |
Viewing skill: ◎I can know more about foreign cultures from English videos or films.(★★) |
Group assessment Amy can help the group members a lot with English.(★★★★) |
English teacher assessment Amy can take an active part in English class and get good scores.(★★★) |
30-40★: Well done! 20-29★: Keep it up! Fewer than 20★: Try harder! Fewer than 10★: Just so so! |
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