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【题目】Here is an astonishing and significant fact: Mental work alone cant 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 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(情感的)attitudes. One of Englands 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

【答案】【1】 C

【2】 B

【3】 A

【4】 B

【解析】本文介绍了科学家最新发现: 脑力劳动不会使人疲劳,使人疲劳的是人的情感态度。

【1】 细节理解题。文章第二段中提到...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.。由此可以判断C正确。

【2】细节理解题。文章的最后一段提到A feeling of being bored, anger, anxiety, tenseness, worry, a feeling of not being appreciatedthose are the emotions that tire sitting workers.。这些都属于unpleasant emotions,故选B。

【3】 观点态度题。通读全文我们可以发现作者对于科学家们的这一发现持赞成态度,作者提出了很多的论据来支持这一观点。故选A。

【4】 推理判断题。文章的观点是脑力劳动不会使人疲劳,所以sitting workers可以通过快乐地工作来保持良好的精神状态。

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