Here is an astonishing and signficant 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 could labor without reaching a stage of fatigue(疲勞). To the amazement of these scientists, they discovered thett blood passing through the brain, when it is active, shows no fatigue at all! If we took a drop of blood from a day labourer, we could find it full of fatigue toxins(毒素) and fatigue products. But if we took blood from the brain of Albert Einstein, it would show no fatigue toxing 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 f efforts as at the beginning. The brain is totally tireless. So what makes us tired.
Some scientists declare that most of our fatigue come 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?Satifaction?No!A feeling of being bored,anger,anxiety,tenseness,worry,a feeling of nt being appreciated---those are 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 toxinscould hardly be found in a labour’s blood.
B．Albert Eistein didn’t feel worn out after a day’s work.
C．The brain could wrk for many hours without fatigue.
D．A mental worker’s blood was filled with fatigue toxins.
2.According to the authour,which of the following can make sitting worker tired？
A．Challenge mental work.
B．Unpleasant emotions.
C．Endless tasks.
D．Physical labor.
3.What’s the authour’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 energic, sitting workers need to ______.
A．have some good blood
B．enjoy their work
C．exercise regularly
D．discover fatigue toxin
1.C
2.B
3.A
4.B
【解析】
【文章大意】本文是科普說明文。通過實驗來證明什么讓人們感到疲勞的。
1.根據(jù)文章的第一段中To the amazement of these scientists, they discovered thett blood passing through the brain, when it is active, shows no fatigue at all!進(jìn)行理解。
2.根據(jù)文章的最后一段的第二句話進(jìn)行判斷。
3.根據(jù)文章的第一段第一句話和最后一段推斷作者是科學(xué)家的觀點的。
4.根據(jù)文章的最后一句話判斷推理。
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I also noticed that all toucans have different beaks! They also have very long unique beaks with an extremely long tongue. It struts(大搖大擺地走) around with its chest sticking out and beak pointed forward. The toucan is a beautiful bird! The beak has a red tip (different shades on every one), but sometimes there is a little turquoise on the bottom half. Then, right where the beak separates there is a splotch of yellow. And the rest of the beak is green. The toucan takes very much pride of itself.
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A. Intelligent B. Confident C. Dangerous D. Colorful
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A. where toucans strut around B. how toucans get food
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| B．Because the symbols are beautiful. |
| C．Because text messages are short. |
| D．Because the users can’t make the words shorter. |
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Here is an astonishing and significant fact: Mental work alone can’t make us tire. It sounds absurd. But a years ago, scientists tried to find out how long the human brain could labor without reaching a stage of fatigue (疲勞). 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 would find it full of fatigue toxins(毒素) 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 effort 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(情緒的) 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 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 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’ idea?
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
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