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1、高考英语说明文 4 篇1Here is an astonishing and significant fact: Mental work alonecan ' mtakeus tire. It sounds absurd /?b's ?d/荒谬的. But a years ago, scientists tried to find out how long the human brain could labor without reaching a stage阶段of fatigue /f?'ti?g/（疲劳）. To the amazement of these sc
2、ientists, they discovered that blood passing through the brain, when it is active, shows no fatigue at all! If we tooka drop of blood from a day laborer 劳动者 , we would find it full of fatiguetoxins /'t?ks?n/ （毒素） and fatigue products. But if wetook blood from the brain of an Albert Einstein, it
3、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很快地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
4、from our mental and emotional（ 情绪的 ） attitudes. One of England 'msost outstanding scientists, J.A. Hadfield, says, “ Th egreater part of the fatigue from which we suffer is of mental origin /'?r?d?n/起源. In fact, fatigue of purely physical origin is rare. D”r. Brill, a famous American scienti
5、st, goes even further. He declares,“ Onehundred 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 /?'za? t?/焦虑, tenseness 紧张 , worry, a feeling
6、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
7、. Albert Einstein didn ' fetel worn after a day ' wsork.C. The brain could work for many hours without fatigue.D. A mental worker ' bslood was filled with fatigue toxins.2. According to the author, which of the following can make sitting workers tired?A. Challenging mental work.B. Unplea
8、sant emotions.C. Endless tasks.D. Physical labo3. What' sthe author ' atstitude 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 worker
9、s need to .A. have some good food. B. enjoy their workC. exercise regularly D. discover fatigue toxins2They baby is just one day old and has not yet left hospital. She is quiet but alert /?'l?t/ （警觉） . Twenty centimeters 厘 from her face researchers have placed a white card with two black spots o
10、n it. She stares at it carefully. A researcher removes the card and replaces it by another, this time with the spots differently spaced. As the cards change from one to the other, her gaze（凝视） starts to lose its focus until a third, with three black spots, is presented. Her gaze returns: she looks a
11、t it for twice as long as she did at the previous card. Can she tell that the number two is different from three, just 24 hours after coming into the world?Or do newborns simply prefer more to fewer? The same experiment, but with three spots shown before two, shows the same return of interest when t
12、he number of spots changes. Perhaps it is just the newness名，新奇 ? Whenslightly older babies were shown cards with pictures of objects （a comb, a key, an orange and so on）, changing the number of objects had an effect separate from changing the objects themselves. Could it be the pattern that two thin
13、gs make, as opposed to three? No again. Babies paid more attention to squares moving randomly on a screen when their number changed from two to three, or three to two. The effect even crosses between senses. Babies who were repeatedly shown two spots became more excited when they then heard three dr
14、umbeats than when they heard just two; likewise （同样地） when the researchers started with drumbeats and moved to spots.5. The experiment described in Paragraph 1 is related to the baby ' s_.A. sense of hearing B. sense of sight C. sense of touch D sense of smell6. Babies are sensitive to the chang
15、e in.A. the size of cardsB. the colour of picturesC. the shape of patterns D. the number of objects7. Why did the researchers test the babies with drumbeats?A. To reduce the difficulty of the experiment.B. To see howbabies recognize sounds.C. To carry their experiment further.D. To keep the babies i
16、n'terest.8. Where does this text probably come from?A. Science fiction.B. Children l'itesrature.C. An advertisement. D.A science report3Last night 'mseteor（ 流星） 英 /'mi?t?/ shower left many people in the community dissatisfied and demanding 苛求的；要求高的；吃力的 answers. According to Gabe Roth
17、sclild, Emerald Valley 'msayor 市长 , people gathered in the suburbs /'s?b?b/of the city, carrying heavy telescopes, expecting to watch the brightly burning meteors passing through the sky. What they found instead was a sky so brightene by the city 'ligshts that it darkened the light of th
18、e meteors passing overhead.“ M yfamily was so frustrated, adm”itted town resident Duane Cosby, “ We wanted to make this an unforgettable family outing, but it turned out to be a huge disappointments. ”Astronomers- /?'str?n?m?/n. 天文学家 -scientists who study stars and planetshave beencomplaining ab
19、out this problem for decades. They say that light pollution prevents them from seeing objects in the sky that they could see quite easily in the past. They call on people and the government to take measures to fight against it.There is yet a population besides professional and amateur/?m? t?（r）/美 /&
20、#39;?m ?.t?r/n. 爱好者 star observers that suffers even more from light pollution. This population consists of birds, bats frogs, snakes, etc. For example, outdoor lighting severely affects migrating（ 迁徙的 ）birds. According to the International Dark-Sky Association. “ 100million birds a year throughout
21、North America die in crashes 撞碎 with lighted buildings and towers. ”Countless more animals casualties（ 伤亡） result from the use of artificial lighting. Clearly, people enjoy the benefits of lighting their evenings, but some scientists think it can be harmful for humans, too. They worry that exposure
22、to light while sleeping can increase person 'schances of getting cancer. Emerald Valley is only one community that is becoming aware of the negative effects of light pollution. For years, Flagstaff, Arizona /,? ri'z ?un ?/ 美 /,?ri'z ?un?/n. 美国亚利桑那州 , has enforced lighting regulations in
23、its city in order to assist astronomers at the Lowell Observatory. 英 /?b'z?v?t（?）r?/美 /?b'z?v?t?ri/ n. 天文台；气象台；瞭望台 Similar efforts have been made worldwide, and a movement is underway 进行中的 to remind us to turn off lights when we are not using them, so that other creatures can share the night
24、.9.It happened last night thatA. the city 'ligshts affected the meteor watchingB. the meteors flew past before being noticedC. the city light show attracted many peopleD. the meteor watching ended up a social outing10. What do the astronomers complain about?A. Meteor showers occur less often tha
25、n beforeB. Their observation equipment is in poor repairC. Light pollution has remained unsolved for yearsD. Their eyesight is failing due to artificial lighting11. What the author concerned about according to Paragraph 4?A. Birds may take other migration pathsB. Animals living habits may change sud
26、denlyC. Varieties of animals will become sharply reducedD. Animals s'urvival is threatened by outdoor lighting12. Lighting regulations in Flagstaff, Arizona areput into effect toA. Lessen the chance of getting cancerB. create an ideal observation conditionC. ensure citizens a good sleep at night
27、D. enable all creatures to live in harmony13. What message does the author most want to give us?A. Saving wildlife is saving ourselvesB. Great efforts should be made to save energyC. Human activities should be environmentally friendlyD. New equipment should be introduced for space study4Almost every
28、 machine with moving parts has wheels, yet no one knows exactly when the first wheel was invented or what it was used for. We do know ， however ， that they existed over 5,500years ago in ancient Asia.The oldest known transport wheel was discovered in 2002 in Slovenia. It is over 5 ， 100 years old. E
29、vidence suggests thatwheels for transport didn't become popular for .while, though . This could be because animals did a perfectly good job of carrying farming tools and humans around.But it could also be because of a difficult situation. While wheels need to roll on smooth surfaces, roads with
30、smooth surfaces weren't going to be constructed until there was plenty of demand for them. Eventually, road surfaces did become smoother, but this difficult situation appeared again a few centuries later. There had been no important changes in wheel and vehicle design before the arrival of moder
31、n road design.In the mid-1700s,a Frenchman came up with a new design of road-a base layer （ 层）of large stones covered with a thin layer of smaller stones. A Scotsman 苏格兰人 improved on this design in the 1820s and a strong, lasting road surface became a reality. At around the same time, metal hubs 英 /
32、h?b/美 /h?b/n. 中心；毂；木片 （the central part of a wheel） 、 came into being, followed by the Wheels were invented in 1967, sixty years after the appearance of tarmacked roads（ 泊油路 ）. As wheel design took off, vehicles got faster and faster.14. What might explain why transport wheels didn 'btecome popu
33、lar for some time?A. Few knew how to use transport wheels.B. Humans carried farming tools just as well. C. Animals were a good means of transport.D. The existence of transport wheels was not known.15. What do we know about road design from the passage?A. It was easier than wheel design.B. It improve
34、d after big changes in vehicle design.C. It was promoted by fast-moving vehicles.D. It provided conditions for wheel design to develop.16. How is the last paragraph mainly developed?A. By giving examples.B. By making comparisons.C. By following time order.D. By making classifications.17. What is the passage mainly about ? A.The beginning of road deaign.B.The development of transport wheel.C. The history of public transport.D. The invention of fast-moving vehicles.