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 reachi 题目和参考答案——青夏教育精英家教网—

精英家教网 > 高中英语 > 题目详情

4．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（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．
29．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 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．
30．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．
31．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．
32．We can infer from the passage that in order to stay energetic，sitting workers need toB．
A．have some good food．
B．enjoy their work
C．exercise regularly
D．discover fatigue toxins．

分析本文是一篇说明文阅读，主要介绍了科学家们通过研究发现脑力劳动并不能使人劳累，使人感到劳累的是人的精神和情感状态，即厌烦、生气、焦急、紧张、忧虑以及不被欣赏等消极的情绪，这些情绪能在体内产生紧张感，使自己感觉到身体疲倦．

解答 29．C 细节理解题．根据第一段Here is an astonishing and significant fact：Mental work alone can't make us tire．可知脑力劳动时间长了并不会让人感觉到累，故选C．
30．B 细节理解题．根据最后一段A feeling of being bored，anger，anxiety，tenseness，worry，a feeling of not being appreciated---those are the emotions that tire sitting workers．可知厌烦、生气、焦虑、紧张还有不高兴的情感会使工人感到劳累，故选B．
31．A 态度判断题．根据第一段Here is an astonishing and significant fact：Mental work alone can't make us tire．We get tired because our emotions produce nervousness in the body．可知我们感觉到累是因为我们身体里产生了紧张的情绪，在这里可以看出作者是赞同这个观点的，故选A．
32．B 推理判断题．根据最后一段Hard work by itself seldom causes fatigue．We get tired because our emotions produce nervousness in the body．可知只要人们不觉得紧张，能享受生活，那么就能保持精力旺盛，而不会觉得累，故选B．

点评此类题目较简单，重在理解全文所讲的内容，题目多以细节题，围绕太空失重的情况下，很多在地球上很平常的事情变的难以实现进行阐述，在答题时注意结合题目找到文章中找到相对应的出处，仔细的对比，快速定位．

练习册系列答案

68所名校图书小升初高分夺冠真卷系列答案

伴你成长周周练月月测系列答案

小升初金卷导练系列答案

年级	高中课程	年级	初中课程
高一	高一免费课程推荐！	初一	初一免费课程推荐！
高二	高二免费课程推荐！	初二	初二免费课程推荐！
高三	高三免费课程推荐！	初三	初三免费课程推荐！
更多初中、高中辅导课程推荐,点击进入>>

相关习题

科目：高中英语 来源： 题型：阅读理解

14．Suppose you work in a big firm and find English very important for your job because you often deal with foreign businessmen．Now you are looking for a place where you can improve your English，especially your spoken English．
Here are some advertisements about English language training from newspapers．You may find the information you need．

Global English Center
*General English in all four skills：listening，speaking，reading，and writing．
*3-month（700yuan），6-month（1，200yuan）and one-year（2，000yuan）courses．
*Choice of morning or evening classes，3hours perday，Mon-Fri．
*Experienced college English teachers．
*Close to city center and bus stops．
Tel：67705272　　Add：105Ahongshan Road，100082

Modem Language School
*Special courses in English for business，travel，banking．hotel management and office skills．
*Small classes（12-16students）on Sat．& Sun．from 2：00-5：00p．m．
*Native English teachers from Canada and USA．
*Language lab and computers supplied．
*3-month course：1，050yuan；6-month course：1，850yuan．
Write or phone；Modem Language School，675Park Road．100056
Tel：67353019

The 21st Century English Training Centre
*We specialize in effective teaching at all levels．
*We offer morning or afternoon classes，both three months and a half at a cost of 800yuan．
*We also have a six-week TOEFL preparation class during winter and summer holidays．
*Entrance exams：June 1and Dec．
*Only 15-minute walk from city center．
Call 67801642for more information．

The International House of English
*Three/Six-month English courses for students of all levels at very low cost：60yuan for 12hours per week；convenient class hours：9：00-12：00a．m．and 2：00-5：00p．m．
*A four-month evening programme for developing speaking skills （same cost as day classes）．
*Free sightseeing and social activities．
*Very close to the Central Park．For further information call 67432308．

21．You work from 9：00a．m．to 4：30p．m．every day．Which school will you choose？D
A．Global English Center and Modem Language School．
B．The 21st Century and the International House．
C．Modern Language School and the 21st Century．
D．Global English Center and the International House．
22．The 21st Century is different from the other three schools in thatA．
A．it requires an entrance examination　
B．it is nearest to the city center
C．its courses are more advanced　　
D．its teaching quality is better
23．You will probably prefer to go to the International House because itB．
A．offers free sightseeing and social activities
B．has a special course in spoken English
C．costs less than the other schools
D．has native English teachers．

查看答案和解析>>

科目：高中英语 来源： 题型：填空题

15．If You Get In，Make College CountAs tuition costs rise，with post-undergraduate （本科毕业后） jobs difficult to find，is higher education worth the cost？
Here is an unfortunate truth：For far too many incoming freshmen，college-any college-is not worth it．Year after year，students fail to get the full value of their tuition．
Many critics blame this cost/value problem on the universities，though each critic might point to a different reason：teachers always think of difficult research，the high costs of athletics，or the popularity of majors that are supposedly not suited to the new job market，to name some of their favorites．
But these are symptoms and not the illness itself．In our experience，the source of the wasted university experience begins with the student．Too often，students make bad choices or，frankly，just not enough great choices．
Too often we meet students who are so exhausted by the business of getting into college that they don't work hard once they arrive-one of the most common wastes of time and tuition．A poorly constructed transcript （成绩单） can be destructive to a student's education．Failure to engage and build professional working relationships with professors in office hours （which may lead to continued study，internships and more） also hurts the student's experience．
Another mistake is failing to make use of the many support networks on today's college campuses．It's almost embarrassing how many good offerings are rolled into each tuition dollar，but most students don't know they exist．
Another common point of failure is filling the schedule with too many extracurricular activities as students once did in high school，rather than getting intensely involved in one or two at most．The same can be said of overburdened course loads．
The final great failure we frequently see is the approach students （and their parents） take to selecting a major and accurately seeing its impact on a future career．University systems are not vocational schools．While critics nowadays complain about the attraction of useless majors-and some do exist-more frequently we see too many students pursue a course of study that is not their strength，simply because it seems to have obvious connections to a potential job after graduation．
Rather than perform poorly in a"practical"major and be of little interest as a future job candidate，we say it is better to major in a subject where a student would do well and master the tools of communication and analysis．Students who choose a unique major should complement （使更具有吸引力） that with some well-chosen skill courses，internships and other co-curricular activities that help with career opportunities after college．
So，is college worth it？It can be．Studies show that college graduates have many advantages-material，social and emotional-that can lead to greater success later in life．
To get the full value out of college，students must be as diligent and creative about getting out of college as they were about getting in．After all，the most beautiful，Olympic saltwater pool does you no good if you don't know how to swim．

Introduction	Students in college are （71）unable/unlikely to get the full value of the constantly rising tuition．Critics hold that the universities are responsible for the problem，but actually it is students themselves that are to （72）blame．
Students' Mistakes	●Students tend to stop working hard after （73）admission/going to college．
	●Students fail to take advantage of （74）resources/support that colleges provide．
	●Students spread themselves too thin by （75）participating/joiningin too many extracurricular activities．
	●Students can't adopt a correct （76）method/way to select a major and accurately see its future potential．
Author's Advice	●Take personal interest and （77）strength（s）/advantage（s）/merit（s）into account．
	●Learn the skills of communication and analysis．
	●Choose some skill courses，internships and other co-curricular activities to （78）increase/boost future career chances．
	●Most importantly，（79）diligent and creativity count．
（80）Conclusion	Students，and only students themselves，can get the best out of college，as long as they learn the skills to swim in the beautiful pool of college．

查看答案和解析>>

科目：高中英语 来源： 题型：阅读理解

12．The problem of global warming has caused a lot of people to try their best to protect the environment．Unluckily，there are still many people who think it is hard to go green．In fact，it is very easy to be green in our daily life．
You can make a great start by learning to recycle （回收利用）．While this looks really simple，there are many people who still throw glass bottles into their common garbage．Almost all cities offer a recycling bin （垃圾箱） for these items．If you put them in the recycling bin instead of throwing them away，you will be on the path to save the earth．
One good thing to recycle is newspaper．But there are still some people who just put their newspaper in the garbage when they finish reading it．As we know，there are many other things we can do with an old newspaper．For example，we can use it to clean our windows．
Another thing that could help you to start to live green is to begin walking a bit more．Many people think nothing of getting in their car and driving one mile to get drinks at the local store．If you walk to the store，not only can it take less time，because you won't have to try to find a parking place，but you will be saving money on gas and helping to protect the environment．If you wish to save even more on gas，take the opportunity to car pool （拼车） each time you can，which has become popular in many countries．
There really are many means by which people can start living green．They only have to make some changes in their lifestyle to improve our environment．
49．What is the main purpose of the first paragraph？C
A．To tell readers that many people are living green．
B．To express worries about global warming．
C．To advise people to learn to live green．
D．To show the importance of living green．
50．According to the text，which of the following is NOT true？D
A．Many people can't recycle glass bottles properly．
B．Newspaper is being recycled by some people．
C．Driving can cause trouble sometimes．
D．Car pooling is not allowed in some countries．
51．What is the best title for the text？B
A．Why do we need to live a green life？
B．Going green is much simpler than we think
C．Global warming is becoming worse
D．What is causing global warming？

查看答案和解析>>

科目：高中英语 来源： 题型：阅读理解

19．Everybody has had at least one experience from which he knows the meaning of life．This time，which took place several years ago，but seems as if it just happened．
On an afternoon several years ago，my brother-in-law opened the bottom drawer of my sister's dress and picked out a beautiful skirt．"Jan bought this the first time we went to New York，at least 8or 9years ago．She never wore it．She was saving it for a special occasion．"he said．I guess this was the occasion：it was the funeral （葬礼） of my sister，after her unexpected death．
He took the shirt and put it on bed，with the other clothes we were taking to the funeral．Then he closed the drawer and turned to me，"Don't ever save anything for a special occasion．Every day you're alive is a special occasion．"
I'm thinking about his words，and they've changed the way I live my life．I'm spending more time with my family and friends and less time in committee meetings．Whenever possible，life should be a kind of experience to enjoy，not to suffer．"Someday"and"one of these days"are losing their importance on my vocabulary．If it's worth seeing or hearing or doing，I want to see and hear and do it now．
Ever since that day，I have been trying very hard not to put off，hold hack or save anything that would add laughter and color to our lives．Every morning when I open my eyes．I tell myself that every day，every minute，every breath，truly is a gift．So cherish every day and find the true meaning of your life．
56．Why did Jan buy the beautiful skirt but didn't wear it？A
A．She waited for a special occasion to wear it on．
B．She wanted to keep it for someone else．
C．She saved it till she grew up．
D．She would give it to herself as a gift some day．
57．What does the underlined word"cherish"mean？A
A．Treasure．
B．Waste．
C．Own．
D．Save．
58．From his experience，the author learns thatB．
A．everybody can have a happy life through efforts
B．every day in our lives is worth cherishing
C．enjoying ourselves is the most important thing in our lives
D．everybody will have some things left to do after his death
59．What does the author write this passage for？C
A．To show how to make good use of every day in life．
B．To explain the true meaning of his brother-in-law's words．
C．To tell people to cherish every day and find the meaning of life．
D．To encourage people to waste time and enjoy themselves in life．
60．What's the best title for this passage？A
A．Every Day Is a Gift
B．My Sister Jan
C．What Is the Meaningful Life Like
D．The Most Important Time in Your Life．

查看答案和解析>>

科目：高中英语 来源： 题型：阅读理解

9．In recent years in America，the mandatory sentencing（强制判刑） movement has really changed the US prison size．The mandatory sentencing movement typically stated the minimum number of prison years for certain crimes people committed．It swept the United States in the 1970s，driving the state prison population up from less than 200，000to about 1.4million today and made prisoning budgets the second-fastest-growing state expense，only second to Medic-aid．But the current sentencing reforms in a growing number of states are starting to reverse that trend-causing the prison population to decline by about 3.8percent since 2009．
Central to the state reforms is a relatively new and more complicated way of information analysis about the law-breaker-including criminal history，drug abuse（滥用） and instances of anti-social behavior-to assess the likelihood of that individual's committing a new crime．And by examining data，the states can revise policies to discourage them from going back to prison．
Many states have found that many people go back to prison not for committing new crimes but for technical mild violations（违反），like failing drug tests or abnormal behaviors due to mental problems．With that knowledge，these states have moved to less costly and more effective actions to replace jail stay．Today，they tend more to send these people for community service．
Some states are also jumping at what is known as the"justice reinvestment"approach，under which they channel significant sums of money into the existing programs on drug treatment and mental health，two main issues behind crimes for many law-breakers．
Despite the advantages of a risk-assessment approach，some states are still flying blind mainly because they don't have the resources to gather data．Moreover，a study has noted，handling high-risk and low-risk criminals in the same way is a big mistake，as"low risk individuals have an increased likelihood of committing crimes again when they receive treatment or services in the same programs as medium-and high-risk individuals．"
（Note：Answer the questions or complete the statements in NO MORE THAN TEN WORDS．）
70．The mandatory sentencing movement had greatly increased prison population throughstating a minimum number of prison years for certain crimes．
71．What is the essential content of today's sentencing reforms？Anew and more complicated way of criminal information analysis．
72．What is many states'softer punishment for minor offences？Community service．
73．Risk-assessment method is not adopted by all the states primarily because oflack of resources．

查看答案和解析>>

科目：高中英语 来源： 题型：选择题

16．Their new system looks modern and advanced while ours，________，seems very old-fashioned．（　　）

A．

in turn

B．

in vain

C．

in poverty

D．

in contrast

查看答案和解析>>

科目：高中英语 来源： 题型：短文改错

9．增加：在缺词处加一个漏字符号（∧），并在此符号下面写出该加的词．
删除：把多余的词用斜线（\）划掉．
修改：在错的词下划一横线，并在该词下面写出修改后的词．
注意：：1、每处错误及其修改均仅限一词；
2、只允许修改十处，多者（从第11处起）不计分．
Dear friends，
It is real a good chance to have met all of you here．We have spent several precious weekend in learning in the English Club．Although we have been members for a short period of times，we have made a great progress．That is because we are all very actively and the activities are not only enjoyable and also helpful．Besides，the foreign teachers here work hard and try his best to make the activities lively and interested．I am very pleased to say that all of us greatly improved our spoken English so far．I am looking forward to see all of you again in the near future!

查看答案和解析>>

科目：高中英语 来源： 题型：填空题

10．In contrast with their system，ours seems very old fashioned..

查看答案和解析>>

同步练习册答案

练习册

高中

初中

小学