题型:阅读选择 题类: 难易度:普通
浙江省2024年中考英语考前最后一卷
C
Why do We Yawn?
Do you yawn? There are about 20 reasons that scientists think are possible for yawning after research. They do not know exactly why yawning happens, but they do know many facts about yawning.
We know that everyone yawns in the same way. First you open your mouth slowly. Your mouth stays open for about five seconds. You take in a lot of air and then push it out. Then you quickly close your mouth. We also know that yawning is contagious. When you see someone yawn, you yawn, too.
Many people say they yawn because they are bored or tired. That might be true. People do often yawn before they sleep and after they wake up. However, we know that people also yawn when they are excited or nervous. Olympic runners, for example, often yawn before a race. Why is that? In 2007, scientists found that a yawn can help a warm brain cool down.
Some scientists believe that yawning makes you notice things more quickly. When you yawn, you breathe deeply. You also stretch (强化) the muscles (肌肉) in your face, mouth, and neck. Your eardrums stretch, too. Maybe this helps you to be quicker to notice things.
In some countries, people think yawning is not nice. People put their hands over their mouths to cover a yawn. In other countries, people think yawning is healthy. They think that opening the mouth very big can let good things in. When they breathe out, they think that bad things go out of the body with the air.
Scientists do not spend much time studying yawning. That is probably because yawning does not hurt. It is just something we do.
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China's Four Great Literary Classics
Romance of the Three Kingdoms(14th century)by Luo Guanzhong
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The Water Margin(14th century) by Shi Nai'an This novel tells about 108 brave men and women and explains how the group comes together to help the weak and fight against unfairness. They win fame throughout China for Price: ¥27 Shipping: ¥8 | |
Journey to the West(16th century) by Wu Cheng'en
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A Dream of Red Mansions(18th century) by Cao Xueqin The novel tells the story of four large rich families and provides a close study of their problems as the families get into big trouble. With so many characters, the novel helps us understand how life was for people of different classes at that time.
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There was a car accident at 3:30 yesterday afternoon. Some policemen arrived there. They found some witnesses(目击者)in the street when the accident happened. The policemen asked them some questions. Here are their answers.
Witnesses | Description(描述) |
Mr. Green | I was walking along the street when the car accident happened. The white car hit the black car and the white car ran away quickly. |
Mrs. Mason | When the car accident happened, I was shopping in the store. I remembered the car number of the white car. |
Alice | I was calling my parents when the car accident happened. I was so nervous and I forgot to write down the car number. |
George | I was walking my dog along the street. When I saw it, I called the police at once. There were lots of people around them. |
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