题型:阅读选择 题类: 难易度:普通
广东省广州市2023-2024学年九年级上学期12月份月考英语试卷
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 could 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(伸展)the muscles 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.
All in all, scientists do not spend much time studying yawning. That is probably because yawning does not hurt. It is just something we do.
A. Jiangsu Art Museum shows modern watercolor paintings by Li Jianchen. He was known as the"Father of Modern Chinese Watercolour" | |
B. An exhibition Everlasting Beauty of Dunhuang by the artist Chang Shana comes to Beijing in the Chinese Traditional Culture Museum. Over 400 copies of the mural(壁画) are on show. | |
C. An exhibition named"cycles" with 118 paintings by Spanish artist Jorge Rando is put on in Shenzhen Museum. The works show motherly love, nature and cycling. | |
D. Lin Sanzhi is known for his caoshu script. An exhibition called My Admiration of Ancient Masters shows his works at Anhui Art Museum. | |
E. An exhibition named Colors is shown at Shandon g Art Museum, Jinan. It is about artworks by women painters from China. | |
F. The Man Ting Fang exhibition at Chengdu Museum shows gold and silver things of Song Dynasty. These objects show the culture and lifestyle of the rich in that time. |
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