Question

【题目】根据短文内容，选择最佳答案。
Here is an astonishing and significant fact：Mental work alone can't make us tire. 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 (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 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 (情绪的)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

Answer 1

【答案】
（1）C
（2）B
（3）A
【解析】本文介绍了科学家的新发现：脑力劳动者感到疲惫是不良的情绪引起的身体紧张而导致的。
（1） 细节理解。根据第一段最后一句To the amazement of these scientists，they discovered that blood passing through the brain，when it is active，shows no fatigue at all! 可知让科学家真正惊讶的事情是我们的大脑根本不会感觉到疲惫。故C正确。
（2）细节理解。根据最后一段前两句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.可知然我们疲惫的是一些不良的情绪。四个选项中只有B项属于这些不良的情绪。故B正确。
（3）推理判断。作者在本文中叙述了我们的大脑不会因为工作而感到疲惫，让我们疲惫的是我们的情绪情感。通篇中作者都持赞成支持的态度。故A正确。