根据文中“When people are sleepy, theyyawn to help stay awake. This is because of fresh oxygen.当人们困倦时,他们打哈欠帮助保持清醒。这是因为新鲜的氧气。可知打哈欠可以让人们变得清醒,故填A。9.A细节理解题。根据文中“When one person yawns,others often begin
Do you know why people yawn(打哈欠)? The most obvious answer is that we yawn because we are tired. But why does being tired make us yawn? How does yawning help us? The truth is that we don’t know the answers to these questions. Scientists have different theories about why we yawn,...
Laura Donovan
We yawn even without thinking about it.Why do we yawn when we are tired? Some people believe that our bodies yawn when we need moreoxygen. When there are not enough oxygen in ourlungs, our mouth open wide. When we do this, ...
【题目】Why do people yawn(打呵欠)? It is a way to get more oxygen(氧气). When people are sleepy, they yawn to help stay awake. This is because of fresh oxygen. Yawning is one thing that newborn babies do often. When one person yawns, others often begin to yawn, too. Once a fi...
第三节 根据短文内容,从短文后的方框中选出能填入空白处的最佳选项。选项中有两项为多余选项。(每小题1.5分,满分7.5分)Why do people yawn(打哈欠)?
Yawning is common among runners waiting 8 (begin) a race.It is 9 (real) common among people waiting to make a speech. Professor Provine says he is most interested in learning why seeing someone yawn makes others yawn as well. As a matter of fact, I found 10(I) yawning a lot as I...
there’s a good chance that they’re not the only one. By spreading from person to person, a single yawn can make a whole group of people become more alert. Human beings have always been social creatures, and the contagious yawn may a result of howhuman evolutionprioritizes the ability ...
Self-report studies indicate that people yawn between six and 23 times per day, which depends upon an individual’s circadian rhythm or chronotype (Baenninger et al., 1996, Provine et al., 1987a, Zilli et al., 2007). Evolutionarily conserved, yawning or a similar form of mandibular ...
E.Even reading the word YAWN can make people yawn. F.However, it doesn't mean that you need rest or relax??ation. G.Other people believe that yawning is a sign that danger is near. H.Another common theory is that a yawn helps regulate our body temperature. ...