高中英语阅读理解专项练习题科普知识型阅读理解

1、1.2013四川卷 阅读理解 Fear may be felt in the heart as well as in the head, according to a study that has found a link between the cycles of a beating heart and the chance of someone feeling fear.Tests on healthy volunteers found that they were more likely to feel a sense of fear at the moment when their h

2、earts are contracting(收缩) and pumping blood around their bodies, compared with the point when the heartbeat is relaxed. Scientists say the results suggest that the heart is able to influence how the brain responds to a fearful event, depending on which point it is at in its regular cycle of contract

3、ion and relaxation. Sarah Garfinkel at the Brighton and Sussex Medical School said: "Our study shows for the first time that the way in which we deal with fear is different depending on when we see fearful pictures in relation to our heart." The study tested 20 healthy volunteers on their

4、reactions to fear as they were shown pictures of fearful faces. Dr Garfinkel said, "The study showed that fearful faces are better noticed when the heart is pumping than when it is relaxed. Thus our hearts can also affect what we see and what we don't see - and guide whether we see fear.&qu

5、ot; To further understand this relationship, the scientists also used a brain scanner(扫描仪) to show how the brain influences the way the heart changes a person's feeling of fear."We have found an important mechanism by which the heart and brain speakto each other to change our feelings and r

6、educe fear," Dr Garfinkel said. "We hope that by increasing our understanding about how fear is dealt with and ways that it could be reduced, we may be able to develop more successful treatments for anxiety disorders, and also for those for those who may be suffering from serious stress di

7、sorder."1. What is the finding of the study?A. One's heart affects how he feels fear. B. fear is a result of one's relaxed heartbeat.C. fear has something to do with one's health. D. Ones fast heartbeats are likely to cause fear.2. The study was carried out by analyzing _.A. volunte

8、ers' heartbeats when they saw terrible picturesB. the time volunteers saw fearful pictures and their health conditionsC. volunteers' reactions to horrible pictures and data form their brain scansD. different pictures shown to volunteers and their heart-brain communication3. Which of the foll

9、owing is closest in meaning to "mechanism" in Paragraph 6?A. Order.           B. System.          C. Machine.          D. Treatment.4.This study may c

10、ontribute to _.A. treating anxiety and stress betterB. explaining the cycle of fear and anxietyC. finding the sky to the heart-brain communicationD. understanding different fears in our hearts and heads答案:1.A2.C3.B4.A2.2013安徽合肥质检It is a tall tale that terrifies most young children. Swallow a piece o

11、f chewing gum and it will remain in your body for seven years before it is digested. Or so they say. An even worse tale is that swallowed gum can wrap itself around your heart.    But what does happen if you should accidentally eat a stick of gum? Chewing gum is made out of gum base, sweet

12、eners, coloring and flavoring. The gum base is pretty indigestibleit is a mixture of different ingredients（成分）that our body cant use.    Most of the time, your stomach really cannot break down the gum the way it would break down other foods. However, your digestive system has another way t

13、o deal with things you swallow. After all, we eat lots of things that we are unable to fully digest. They keep moving along until they make it all the way through the gut（肠子）and come out at the other end one to two days later.   The saliva（唾液）in our mouths will make an attempt at digesting

14、 chewing gum as soon as we put it in our mouths. It might get through the shell but many of gum's base ingredients are indigestible. It's then down to our stomach muscleswhich contract and relax, much like the way an earthworm movesto slowly force the things that we swallow through our syste

15、ms.   Swallowing a huge piece of gum or swallowing many small pieces of gum in a short time can cause a blockage within the digestive system, most often in children, who have a thinner digestive tube than adultsbut this is extremely rare. 1.Children might feel terrified after swallowing ch

16、ewing gum mainly because  _.A. they believe the tall tales about chewing gum B. chewing gum will stay in their body for many yearsC. their heart will be wrapped by chewing gumD. chewing gum is indigestible for children2. What happens to the food that cant be fully broken down?  &

17、#160;   .A. It remains in our digestive system foreverB. It will be eventually moved out of our bodyC. It will fight against the power of the gutD. It will stick to the gut for one or two days 3. The word It (in the 4th paragraph) refers to “_      ”.A. the attempt

18、           B. the salvia          C. the shell      D. the gum base 4. What would be the best title for text?      A. How does our digestive system wo

19、rk?B. Can chewing gum be swallowed by kids?C. Does swallowing chewing gum matter?D. Why swallowing chewing gum frightens kids? 参考答案: 1.A 2.B 3.B4. C3.2013 江西南昌模拟“Plants were expected to get larger with increased carbon dioxide in the atmosphere，but changes in temperature，humidity and nutrient availa

20、bility seem to have trumped the benefits of increased carbon dioxide，” said researchers from the National University of Singapore. 45 percent of the species studied now reach smaller adult sizes than they did in the past.The researchers point out that warmer temperatures and changing habitats，caused

21、 by climate change，are possible reasons for the shrinking of creatures. “We do not yet know the exact mechanisms involved，or why some organisms are getting smaller while others are unaffected，” the researchers said.“Until we understand more，we could be risking negative consequences that we cant yet

22、quantify.” The change was big in cold-blooded animals.Only two decades of warmer temperatures were enough to make reptiles (爬行动物) smaller.An increase of only 1 caused nearly a 10 percent increase in metabolism (新陈代谢)Greater use of energy resulted in tiny tortoises and little lizards.Fish are smaller

23、 now too.Though overfishing has played a part in reducing numbers，experiments show that warmer temperatures also stop fish growth.There is a recent report on warmer temperatures negative effects on plankton (浮游生物)，the base of the marine ecosystem. Warm­blooded animals werent immune from the siz

24、e change caused by climate change.Many birds are now smaller；Mammals have been miniaturized too.Soay sheep are thinner.Red deer are weaker.And polar bears are smaller，compared with historical records.This isnt the first time this has happened in Earths history. 55 million years ago，a warming event s

25、imilar to the current climate change caused bees，spiders and ants to shrink by 50 to 75 percent over several thousand years.That event happened over a longer time than the current climate change. The speed of modern climate change could mean organisms may not respond or adapt quickly enough，especial

26、ly those with long generation times.So，it is likely that more negative influences of climate change will be shown in the future. 1Which of the following would be the best title for the passage? AWhy do some species become smaller? BHow does climate change in Earths history? CClimate change has many

27、negative effects DSpecies become smaller as climate warms 2The underlined word “trumped” in the first paragraph can be replaced by “_” Aincreased Bbeaten Cstrengthened Dequaled 3Researchers from the National University of Singapore believe that_. Ahow climate change affects animals sizes has not bee

28、n found clearly Ball the animals on the Earth have become smaller Ctoo many studies on animals sizes have been done Dclimate change has more negative effects on warm-blooded animals 4What can we learn from the passage? AClimate change has even affected plankton negatively. BBirds have suffered more

29、from climate change than fish. CCold-blooded animals become smaller because of the lack of food. DThe warming event has never happened in Earths history before. 参考答案: 1.D 2.B 3.A 4. A 5.A4.2013郑州预测二 If the eyes are the romantics window into the soul, then the teeth are an anthropologists ( 人类学家 ) do

30、or to the stomach. In a study published last month in the journal Science, Peter Ungar of the University of Arkansas and his partner, Matt Sponheimer of the University of Colorado, US, examined the teeth of our early human ancestors to find out what they were really eating. They already knew that di

31、fferent foods cause different marks on teeth. Some cause scratches, while others cause pits (坑).The carbon left on teeth by different foods is also different. Tropical grasses, for example, leave one kind of carbon, but trees leave another kind because they photosynthesized ( 光合作用 ) differently. Tra

32、ditionally, scientists had looked at the size and shape of teeth and skulls ( 头骨 ) to figure out what early humans ate. Big flat teeth were taken to be signs that they ate nuts and seeds, while hard and sharp teeth seemed good for cutting meat and leaves. But this was proven wrong.The best example w

33、as the Paranthropus (傍人), one of our close cousins, some of which lived in eastern Africa. Scientists used to believe Paranthropus ate nuts and seeds because they had big crests(突起)on their skulls, suggesting they had large chewing muscles and big teeth. If this had been true, their teeth should hav

34、e been covered with pits like the surface of the moon. They would also have had a particular type of carbon on their teeth that typically comes from tree products, such as nuts and seeds. However, when the two scientists studied the Paranthroupus, it turned out to have none of these characteristics.

35、 The teeth had a different kind of carbon, and were covered with scratches, not pits. This suggests they probably ate grass, not nuts and fruit stones. It was the exact opposite of what people had expected to find. Carbon “foodprints” give us a completely new and different insight into what differen

36、t species ate and the different environments they lived in. If a certain species had the kind of carbon on its teeth that came from grasses, it probably lived in a tropical grassland, for example.1.The underlined sentence in Paragraph 1 probably means that anthropologists can  _.A. know th

37、e structure of human stomachs by studying their teethB. find out the diet of early humans by studying their teethC. learn whether humans were healthy by looking at their teethD. get the most useful information about humans from their teeth2.According to Paragraphs 3-5，which of the followin

38、g statements is true?A. Pits on teeth are caused by eating grass or leaves.B. Scratches on teeth are caused by eating nuts or seeds.3.The example of the Paranthropus was mentioned in order to tell us _.A. they were one of our close cousins living in eastern AfricaB. living enviro

39、nment makes a difference to skull structureC. they had different eating habits from other humansD. the size and shape of teeth dont show accurately what early humans ate4.Which of the following structures shows the best organization of the article?(CP： Central Point Para: Paragraph P： Point Sp:

40、 Sub-point次要点 C: Conclusion)参考答案: 1.B 2.C 3.D 4. A5-2014预测Global Positioning Systems are now a part of everyday driving in many countries. These satellite-based systems provide turn-by-turn directions to help people get to where they want to go. But they can also cause a lot of problems, sending you

41、 to the wrong place or leave you completely lost. Many times, the driver is to blame. Sometimes a GPS error is responsible. Most often, says Barry Brown, it is a combination of the two.Barry Brown is with the Mobile Life Centre in Stockholm, Sweden. The center studies human-computer interaction, or

42、HCI, especially communications involving wireless devices. We spoke to Mr. Brown by Skype. He told us about an incident involving a friend who had flown to an airport in the eastern United States. There he borrowed a GPS-equipped car to use during his stay.Barry Brown: “And they just plugged in an a

43、ddress and then set off to their destination. And, then it wasnt until they were driving for thirty minutes until they realized they actually put in a destination back on the West Coast where they lived. They actually put their home address in. So again, the GPS is kind of 'garbage in garbage ou

44、t'.”Mr Brown says this is a common human error. But, he says, what makes the problem worse has to do with some of the shortcomings, or failures, of GPS equipment.Barry Brown: “One problem with many GPS units is they have a very small screen and they just tell you the next turn. Because they just

45、 give you the next turn, sometimes that means that it is not really giving you the overview that you would need to know that its going to the wrong place.”Barry Brown formerly served as a professor with the University of California, San Diego. While there, he worked on a project with Eric Laurier fr

46、om the University of Edinburgh. The two men studied the effects of GPS devices on driving by placing cameras in peoples cars. They wrote a paper based on their research. It is called “The Normal, Natural Troubles of Driving with GPS.”Barry Brown: “One of the things that struck us, perhaps the most i

47、mportant thing was that you have to know what youre doing when you use a GPS. There are these new skills that people have developed. There are these new competencies that you need to have to be able to use a GPS because they sometimes go wrong.” Barry Brown says this goes against a common belief tha

48、t GPS systems are for passive drivers who lack navigational skills.“The Normal, Natural Troubles of Driving With GPS” lists several areas where GPS systems can cause confusion for drivers. These include maps that are outdated, incorrect or difficult to understand. They also include timing issues rel

49、ated to when GPS commands are given.Barry Brown says to make GPS systems better we need a better understanding of how drivers, passengers and GPS systems work together.1. What is the best title for this passage?A. Is GPS system reliable to use?B. What is the use of GPS?C. How to make the most of GPS

50、?D. Blame! GPS or Passengers?2. What is the implication of the underlined part?A. GPS is just a garbage device.B. GPS will not correct human errors.C. GPS adjusts your wrong destination.D. GPS is just as smart as human beings.3. Which is NOT mentioned as a GPS shortcoming in the passage?A. Small scr

51、een. B. Timing of commands.C. Outdated maps.D. Dear cameras GPS uses.4. According to the passage, people commonly believe that _.A. you have to know where to go when using GPSB. you need to have new competencies to use GPS wellC. GPS is proper for drivers with little sense of directionD. GPS is fit

52、for people having good understanding of maps参考答案: 1.A 2.B 3.D 4. C6-2014预测Have you ever wondered why stems(茎)grow upwards and roots downwards? Why do plants always seem to turn towards the light and climbing plants run up rather than down? The answer is simple: auxin(生长素), a chemical substance that

53、controls growth in plants. Auxin gives away its secretsAuxin is a plant hormone(激素). Darwin was already interested in it in the 19th century. Only in recent years, however, has the hormone started to give away its secrets, thanks to intensive molecular research. Auxin is produced in the young, growi

54、ng parts of plants and then transported throughout the plantto a low­lying stem for example. The stem needs to straighten out as soon as possible to be able to absorb the topside, resulting in the underside growing faster and the stem straightening out. For the same reason, plants in front of windows will always turn to the light. This active regulation of auxin transport allows plants to take ideal advantage of local and changing conditions. A new means of transport for auxin The transport of auxin through the plant plays a vital role. And, from