13.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 at 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 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.
24.What surprised the scientists a few years ago?C
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.
25.According to the author,which of the following can make sitting workers tired?B
A.Challenging mental work
B.Unpleasant emotions
C.Endless tasks
D.Physical labor.
26.What's the author's attitude towards the scientists'idea?A
A.He agrees with them. B.He doubts them.
C.He argues against them. D.He hesitates to accept them.
27.What do sitting workers need to do in order to stay energetic?B
A.Have some good food. B.Enjoy their work.
C.Exercise regularly. D.Discover fatigue toxins.
分析 本文是一篇科教類閱讀,主要揭露了一個最新的事實--腦力勞動是不會讓我們感到疲勞的.
解答 24-27.CBAB
24題答案:C考查細節(jié)推理,根據(jù)第一段第四句"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,讓科學家們感到驚訝的是,當流經(jīng)大腦的血液是活躍的時候,大腦不會疲勞,即大腦就算工作很長時間也不會疲勞.故答案選C.
25題答案:B考查細節(jié)推理,根據(jù)最后一段倒數(shù)第三句"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,不愉快的情感會讓腦力勞動者感到疲勞.故答案選B.
26題答案:A考查細節(jié)推理,文章第一段揭露了一個讓人吃驚的事實;腦力勞動是不會讓我們感到疲勞的,作者又通過一個科學實驗驗證這一事實的正確性,然后進一步分析讓腦力勞動者感到疲勞的是一些不良情緒,并引用一些著名科學家的話進行論證.故答案選A.
27題答案:B考查細節(jié)推理,根據(jù)最后一段可知,腦力勞動者之所以感到疲勞是因為受工作中產(chǎn)生的一些不良情緒的影響.從中我們可以體會到,假如我們心態(tài)平和享受工作是不會產(chǎn)生這些不良情緒的,這樣就不會感覺到疲勞.因此,要保持精力充沛,腦力勞動者應享受工作.故答案選B.
點評 本文是一篇科教類閱讀,題目涉及多道細節(jié)理解題,做題時結合原文和題目有針對 性找出相關語句進行仔細分析,結合選項選出正確答案.推理判斷也是要在抓住關鍵句子的基礎上合理的分析才能得出正確的答案.