Question

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 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 workers 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

 

Answer 1

1.C

2.B

3.A

4.B

【解析】

試題分析: 研究發(fā)現(xiàn)，單純的腦力勞動并不會令人感覺疲勞，而真正令人感覺疲勞的是心理和情感態(tài)度，如煩躁、氣憤、焦慮、緊張、擔心、不被欣賞等。這些情感都是令腦力勞動者感覺疲勞的因素。

1.C細節(jié)理解題。根據(jù)第一段中“To the amazement of these scientists，they...no fatigue at all！”可知，令這些科學家們驚訝的是，大腦活躍時流經(jīng)大腦的血液并沒有表現(xiàn)出疲勞，故C項正確。A項與“If we took a drop of blood...and fatigue products.”意思表達相反，故排除；第一段最后一句指出在一天結(jié)束的時候，腦力勞動者的大腦血液中沒有疲勞因素，這不是科學家們的驚訝之處，且與D項意思不一致，故排除B、D兩項，故選C項。

2.B細節(jié)理解題。根據(jù)倒數(shù)第二段最后一句可知，使腦力勞動者疲勞的主要原因是情感問題，最后一段指出了是哪些情感，故B項正確。

3.A推理判斷題。本文主要介紹了科學家的研究成果，作者對此進行了進一步的分析、論證，對情感態(tài)度導致人疲勞的觀點持肯定態(tài)度，并未對此進行質(zhì)疑，故A項正確。

4.B推理判斷題。根據(jù)最后兩段的敘述可知，心理和情感態(tài)度是導致腦力勞動者疲勞的主要原因，因而保持好的心理狀態(tài)才會感覺精力充沛；B項意為“喜歡他們的工作”，符合文意，這就避免了導致疲勞的煩躁、氣憤等情感。其余幾項都與導致疲勞的因素無關(guān)，故排除，故選B項。

考點：科普類閱讀。