Here is an astonishing and significant fact: Mental work alone can't make us tired. It sounds absurd. But a few years ago, scientists tried to find out how long the human brain could labor without reaching a stage of fatigue(疲劳). To the amazement of these scientists, they discovered that blood passing through the brain, when it is active, shows no fatigue at all! If we took a drop of blood from a day laborer, we could find it full of fatigue toxins(霉素) and fatigue products. But if we took blood from the brain of an Albert Einstein, it would show no fatigue toxins at the end of the day.
So far as the brain is concerned, it can work as well and swiftly at the end of eight or even twelve hours of efforts as at the beginning. The brain is totally tireless. So what makes us tired?
Some scientists declare that most of our fatigue comes from our mental and emotional(情感的) attitudes. One of England's most outstanding scientists, J. A. Hadfield, says, “The greater part of the fatigue from which we suffer is of mental origin. In fact, fatigue of purely physical origin is rare.” Dr. Brill, a famous American scientist, goes even further. He declares, “One hundred percent of the fatigue of a sitting worker in good health is due to emotional problems.”
What kinds of emotions make sitting workers tired? Joy? Satisfaction? No! A feeling of being bored, anger, anxiety, tenseness, worry, a feeling of not being appreciated—those are the emotions that tire sitting workers. Hard work by itself seldom causes fatigue. We get tired because our emotions produce nervousness in the body.
1.What surprised the scientists a few years ago?
A.Fatigue toxins could hardly be found in a laborer's blood.
B.Albert Einstein didn't feel worn out after a day's work.
C.The brain could work for many hours without fatigue.
D.A mental worker's blood was filled with fatigue toxins.
2.According to the author, which of the following can make sitting workers tired?
A.Challenging mental work. B.Unpleasant emotions.
C.Endless tasks. D.Physical labor.
3.What's the author's attitude towards the scientists' ideas?
A.He agrees with them.
B.He doubts them.
C.He argues against them.
D.He hesitates to accept them.
4.We can infer from the passage that in order to stay energetic, sitting workers need to ________.
A.have some good food
B.enjoy their work
C.exercise regularly
D.discover fatigue toxins
科目:高中英语 来源:2016届高考试卷分项版解析专题11英语试卷(解析版) 题型:单项填空
Not once ________ to Michael that he could one day become a top student in his class.
A. occurred it B. it did occur
C. it occurred D. did it occur
查看答案和解析>>
科目:高中英语 来源:2016届高考试卷分项版解析专题09英语试卷(解析版) 题型:单项填空
________ I have to give a speech, I get extremely nervous before I start.
A. Whatever B. Whenever
C. Whoever D. However
查看答案和解析>>
科目:高中英语 来源:2016届高考试卷分项版解析专题09英语试卷(解析版) 题型:单项填空
I believe you will have a wonderful time here you get to know everyone else.
A. though B. as if
C. once D. so that
查看答案和解析>>
科目:高中英语 来源:2017届新疆兵团农二师华山中学高三上期学前考试英语试卷(解析版) 题型:短文改错
短文改错
假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌的以下作文。文中共有10处语言错误,每句中最多有两处,每处错误仅涉及一个单词的增加,删除或修改。
增加:在缺词处加一个漏字符号(∧),并在其下面写出该加的词。
删除:把多余的词用斜线(\)划掉。
修改:在错误的词下划一横线,并在该词下面写出修改后的词。
When I was a kid, my sisters and I started a club for fan of a band. Our club met regular to trade facts about the band’s and to listen to their music. We were all different ages, and we might not have many common besides our love for this music, or the club was important to us for a while. We had good time and became good friends.
Since then, I had joined all kind of clubs. Clubs give us a chance to focus on special interests, improve a skill, or learn about new one. Clubs are also about make new friends. I’ve learned that the best clubs are the ones that welcome someone who wants to join.
查看答案和解析>>
科目:高中英语 来源:2017届山东省高三上学期开学考试英语试卷(解析版) 题型:单词拼写
根据下面句子中的汉语提示写出单词的正确形式。
1.Research findings have shown that about 20 percent of people only 10 percent can be __________(分类) as “early birds”.
2.The company never __________(妥协) on the quality of its products.
3.It was this exploring around problems and his __________(充满活力的) spirit that led to his most famous invention—the telephone in 1876.
4.The __________(标准) are so strict that it is difficult to get new ideas accepted unless they are truly novel.
5.The __________(最初的) requirement is that you need perfect DNA which gives information for how cells are to grow.
查看答案和解析>>
科目:高中英语 来源:2017届山东省高三上学期开学考试英语试卷(解析版) 题型:阅读理解
Finding time to read is an important part of developing reading and writing skills for all kids. And there are many easy and convenient ways to make reading a part of each day — even when it's tough to find time to sit down with a book.
Car trips, waits in checkout lines and the doctor's office are all opportunities for reading. Keep books or magazines in your car, or backpack to pull out whenever you're going to be in one place for a while. Even if you can't finish a book, read a few pages or discuss some of the pictures.
Encourage kids to bring favorite books and magazines along wherever you go. While it's attractive to provide electronic games and readers, be sure to alternate electronic media with plenty of opportunities to read traditional print books.
Reading opportunities are everywhere you go. While riding in the car, for example, encourage kids to spot words and letters (on billboards, store signs, etc.), turning it into a game (“Who’ll be the first to find a letter B?”).
Even daily tasks like cooking can provide reading moments. Kids can assist you as you cook by telling you how much flour to measure. Give your child a catalogue to read while you sort through the mail. Ask relatives to send your child letters, e-mail, or text messages, and read them together. Help your child create letters or messages to send back to the relatives. These types of activities help kids see the purpose of reading and of print.
Even when you’re trying to get things done, you can encourage reading. While cleaning, for instance, you might ask your child to read a favorite book to you while you work.
Make sure kids get some time to spend quietly with books, even if it means cutting back on other activities, like watching TV or playing video games.
Most important, be a reader yourself. Kids who see their parents reading are likely to imitate them and become readers, too!
1.What do we know about kids in Paragraph 3?
A. They are suggested taking reading materials only.
B. They can’t resist the desire of playing games.
C. Reading and playing games can be done by turns.
D. They are forbidden to play electronic games.
2.How does the author advise kids to keep in touch with relatives?
A. Make written communication.
B. Make a dialogue with each other.
C. Learn skills from them.
D. Read a catalogue together.
3.What can we learn from the last paragraph?
A. The longest journey begins with the first step.
B. God helps those who help themselves.
C. Detail is the key to success.
D. A fine example has boundless power.
4.What may be the best title for the text?
A. Reading approaches
B. Finding reading moments
C. Encouraging kids to read
D. What reading means to kids
查看答案和解析>>
科目:高中英语 来源:2017届广西桂林十八中高三上期第一次月考英语试卷(解析版) 题型:阅读理解
There’s a whole lot of things that people fill their stomachs with. Some of them keep people alive. Some of them taste good to people. Some of them help people win pie-eating contests. Alcohol does none of these things. Why do people keep drinking it? And what does it do once it gets to their stomachs?
There are all kinds of alcohol molecules (分子), but the one that people most often pour down their throat is ethanol (乙醇). Ethanol is very tiny and it dissolves in water, so it gets into all sorts of places that it’s not supposed to. Alcohol heads for the digestive system. Because it dissolves in water, it can get into the water in the bloodstream. Because ethanol, to a certain extent, can pass through cell membranes(膜). It can go almost anywhere. It spreads through the muscles, and is sweated — unmetabolized(未经新陈代谢的) and whole — through the skin. It gets into the heart. It even takes a walk through the brain, and this is the secret of its powers.
Alcohol depresses the nerves, and the nerves affect almost every area of the body. Enough alcohol makes people sleep, so people who become unconscious choke on their own vomit (呕吐物). Most worryingly, enough alcohol can shut down those parts of the brain just like any other parts. People become unconscious and their brains simply forget to breathe.
Alcohol is broken down in the liver. Alcohol doesn’t destroy the liver, but products that the liver breaks the alcohol into do cause damage. A glass of wine per day can not do any harm. Instead, it can prevent heart attacks or can make someone functionally young. And it is kind of nice to know that sometimes, relaxation and cheer can be bottled. All that’s needed is to take care how much alcohol is let into a person’s brain.
1.How does the author introduce the topic of the text?
A. By statement.B. By question.
C. By arguing.D. By explaining.
2.Why can alcohol reach the brain?
A. Because it can move through water molecules in the blood.
B. Because it is small enough to get through any narrow space.
C. Because it is so light that the bloodstream can transport.
D. Because it is absorbed only by the cells in the stomach.
3.What’s the main idea of Paragraph 3?
A. Alcohol affects the work of the nerves.
B. Alcohol has an effect on people’s breath .
C. People are drunk when their brains get drunk.
D. Drinking too much is quite dangerous.
4.From the passage, we can know ________.
A. many people like a drink when they feel relaxed
B. enough alcohol can control the brain activities
C. alcohol damages the liver indirectly
D. proper alcohol may lead to better sleep
查看答案和解析>>
科目:高中英语 来源:2017届黑龙江哈尔滨六中高三上期开学考试英语试卷(解析版) 题型:短文改错
假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文。文中共有10处语言错误,每句中最多有两处。错误涉及一个单词的增加、删除或修改。
增加:在缺词处加一个漏词符号(/\),并在其下面写出该加的词。
删除:把多余的词用斜线(\)划掉。
修改:在错的词下划一横线,并在该词下面写出修改后的词。
注意:1、每处错误及其修改均仅限一词;不按要求方式改的不给分!
2、只允许修改10处,多者(从第11处起)不计分。
In recent years, more and more parents send their children to famous schools, thought it can ensure that their children can be admitted by better universities after graduation.
It is true that famous schools are furnishing with better teaching facilities. What's more, teachers are excellent, that come from all over the country and even abroad. They have the ability make classes more lively and interesting, so students will be able to accept knowledge better. Besides, not every student is fit to go to famous schools where there is a fierce competition among students. And students there have to work much harder than that in ordinary schools.
I suggest effective measures are taken to make sure all the schools provide equal good education. Only in this way can all the students have equal rights to receive quality education.
查看答案和解析>>
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com