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题型:阅读理解-阅读单选 难度:0.65 引用次数:54 题号:4043981
Nowadays the U.S. students are sleepy in school because they spend too much time texting, playing video games, watching TV and using the media in other ways.
“Heavy media use interferes with sleep by reducing sleep duration, making it harder to fall asleep, and lowering sleep quality,” Meilan Zhang, an assistant professor at the University of Texas at El Paso, wrote in her research review in the journal, Sleep Medicine.
But the relationship between youth’s media use and sleep is not so simple, said Michael Gradisar, who authored both that review and the Sleep Medicine meta-analysis. “Technology use is the new evidence when we are trying to answer ‘Why are school-age children sleeping less?’” said Mr. Gradisar, an associate professor of psychology at Flinders University in Adelaide, Australia.
There may be safe limits to technology use, Mr. Gradisar stated. For instance, recent research results indicate that using a bright screen for an hour before bed or even playing violent video games for less than that will not necessarily interfere with teenagers’ sleep, he wrote.
But longer periods of usage can be harmful to sleep, Mr. Gradisar added. Rather than delaying school start times, he said, the first step should be educating parents about limiting the hours that their children are using technology before bed, and enforcing a consistent bedtime.
Early school start times are also commonly blamed for students’ sleepiness, especially for adolescents. Secondary schools around the nation and the world have been delaying start times, often with positive results.
Mr. Minnich of the TIMSS and PIRLS International Study Center hesitated to put blame to any particular factor. But he did think that cost-saving measures to consolidate(合并)bus routes might help explain U.S. students’ sleepiness.
“For those children who board the bus first, they must get up earlier, may end up sleeping on the way to school, and may end up arriving at school sleepy.” he said.
1. Which of the following may be the best title for the text?
A.Kids benefit a lot from technology.
B.Several sleep troubles appear at school.
C.Some tips can help kids sleep well.
D.Several factors affect kids’ sleep.
2. Which of the following may be the good way to help kids sleep better?
A.Parents should be well educated.
B.Technology is forbidden at home.
C.Their playing time must be limited.
D.They are allowed to go to school early.
3. Who are most likely to be interested in the text?
A.The teachers.B.The parents.
C.The officials.D.The researchers.
【知识点】 个人保健 说明文

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文章大意:这是一篇说明文。本文阐述了我们的大脑就像一台学习机器,只要我们加以锻炼和运用,可以阻止它衰退。

【推荐1】Sorry to say, our brains naturally start slowing down at the cruelly young age of 30. It used to be thought that this couldn't be helped, but people of any age could train their brains to be faster and, in effect, younger. Our brain is a learning machine. Given the right tools, we can train our brains to act like they did when we were younger. All that is required is dedicated (专注的)practice: exercise for the mind.

Michael Merzenich, a neuroscientist at the University of California, San Francisco, has developed a computer-based training schedule to speed up how the brain processes information, called Brain Fitness Program. Since much of the data we receive comes through speech, the program works with language and hearing to improve both speed and accuracy.

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Anything that closely engages your focus and is strongly rewarding will kick your brain into learning mode and will definitely improve it. Give one of these interesting brain exercises airy.

1. Why does the author call our brain a learning machine?
A.It works well at any age.B.It can be trained to be sharp.
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D.To list words that have the same meaning.
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C.It's hard to predict.D.Ifs likely to be hurt.
4. What is the author's purpose in writing the text?
A.To stress the functions of the brain.
B.To show different attitudes towards ageing.
C.To tell readers how to keep their brain young.
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文章大意:这是一篇说明文。亚健康是身体对压力、疲劳的一种反应,即使最先进的仪器也查不出病因。所以不必去医院,也不必吃药,但是不能听之任之,不认真对待。正确的方法是找出原因、减轻压力、消除疲劳、平衡膳食。

【推荐2】Feel tired lately? Has a doctor said he can’t find anything wrong with you? Perhaps he sends you to a hospital, but all the advanced equipment there shows there is nothing wrong with you.

Then, consider this: you might be in a state of sub-health.

Sub-health, also called the third state or gray state, is explained as borderline state between health and disease.

According to the investigation by the National Organization, over 45 percent of sub-health people are middle-aged or elderly. The percentage is even higher among people who work in management positions as well as students around exam-week.

Symptoms include a lack of energy, depression, slow reactions, insomnia, agitation, and poor memory. Other symptoms include shortness of breath, sweating and aching in the waist and legs.

The key to preventing and recovering from sub-health, according to some medical experts, is to form good living habits, alternate work and rest, exercise regularly, and take part in open air activities.

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