题目
题型：不详难度：来源：
小题1:What is the colour of blood in a vein near the surface of the skin?
| A．Blue. | B．Light yellow. |
| C．Red. | D．Dark reddish purple. |
| A．Because their spine is in active use. |
| B．Because they are more easily affected by gravity. |
| C．Because they keep growing backwards. |
| D．Because their spine becomes more bent. |
| A．In the long run，our brain probably works harder than our heart. |
| B．When our brain senses the spinning，we will feel dizzy. |
| C．The brains of the other mammals are as complex as those of humans. |
| D．Our feelings and emotions come from the most developed area in our brain. |
| A．To give advice on how to stay healthy. |
| B．To provide information about our body. |
| C．To challenge new findings in medical research. |
| D．To report the latest discoveries in medical science. |
答案
小题1:D
小题2:D
小题3:A
小题4:B
解析
小题1:解析：选D。细节理解题。根据方框内首段第三句可知，尽管血液在体外显现出红色，但在比较靠近皮肤的静脉血管里呈现的是绛紫色。
小题2:解析：选D。细节理解题。根据方框内第四段最后两句可知，老年人变矮更多的是因为脊柱变得有点弯曲。故选D项。
小题3:解析：选A。细节理解题。根据方框内第二段可知，归根到底，大脑可能比心脏更劳累些，故A项判断正确。根据方框内倒数第三段可知，大脑觉得我们在眩晕时，实际上我们并没有，可排除B项；根据方框内倒数第二段并结合常识可排除C、D两项。
小题4:解析：选B。推理判断题。通读全文可知，本文是一篇科普性文章，作者旨在向我们说明一些与我们身体有关的信息，故B项正确。
核心考点
试题【小题1:What is the colour of blood in a vein near the surface of the skin?A．Blue.B．】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
The paper，published this March in Psychology and Aging，examined health and welfare surveys from roughly 40,000 Germans between ages 18 and 96.The surveys were conducted every year from 1993 to 2003.
Survey respondents (受访者) were asked to estimate their present and future life satisfaction on a scale of 0 to 10，among other questions.
The researchers found that young adults (age 18 to 39) routinely overestimated their future life satisfaction，while middleaged adults (age 40 to 64) more accurately predicted how they would feel in the future.Adults of 65 and older，however，were far more likely to underestimate their future life satisfaction.Not only did they feel more satisfied than they thought they would，the older pessimists seemed to suffer a lower ratio (比率) of disability and death for the study period.
“We observed that being too optimistic in predicting a better future than actually observed was associated with a greater risk of disability and a greater risk of death within the following decade，”wrote Frieder R．Lang，a professor at the University of ErlangenNuremberg.
Lang and his colleagues believed that people who were pessimistic about their future may be more careful about their actions than people who expected a rosy future.
“Seeing a dark future may encourage positive evaluations of the actual self and may contribute to taking improved precautions (预防措施)，”the authors wrote.
Surprisingly，compared with those in poor health or who had low incomes，respondents who enjoyed good health or income were associated with expecting a greater decline.Also，the researchers said that higher income was related to a greater risk of disability.
The authors of the study noted that there were limitations to their conclusions.Illness，medical treatment and personal loss could also have driven health outcomes.
However，the researchers said a pattern was clear.“We found that from early to late adulthood，individuals adapt their expectations of future life satisfaction from optimistic，to accurate，to pessimistic，”the authors concluded.
小题1:According to the study，who made the most accurate prediction of their future life satisfaction?
| A．Optimistic adults. |
| B．Middleaged adults. |
| C．Adults in poor health. |
| D．Adults of lower income. |
| A．to fully enjoy their present life |
| B．to estimate their contribution accurately |
| C．to take measures against potential risks |
| D．to value health more highly than wealth |
| A．They will earn less money. |
| B．They will become pessimistic. |
| C．They will suffer mental illness. |
| D．They will have less time to enjoy life. |
| A．Pessimism guarantees chances of survival. |
| B．Good financial condition leads to good health. |
| C．Medical treatment determines health outcomes. |
| D．Expectations of future life satisfaction decline with age. |
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(情感的) 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 a 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.
小题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 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. |
| A．Challenging mental work. |
| B．Unpleasant emotions. |
| C．Endless tasks. |
| D．Physical labor. |
| A．He agrees with them. |
| B．He doubts them. |
| C．He argues against them. |
| D．He hesitates to accept them. |
| A．have some good food |
| B．enjoy their work |
| C．exercise regularly |
| D．discover fatigue toxins |
It is called the United States Conference of Mayors" Climate Protection Agreement.Local leaders have agreed to follow the suggestions of the Kyoto Protocol in their communities.They have also agreed to urge state and federal governments to follow these suggestions.One goal is to reduce air pollution to the 1990 levels by 2012.
A “green” city might work on several kinds of environmental goals and programs.These include air quality，reducing electricity use, green building, public health, the reuse of materials, water quality and clean transportation.
The Natural Resources Defense Council works to protect the environment through action, law and science.One of its online projects is called Smarter Cities, which lists some cities that have made important environmental steps.
Washington，D.C.is also a leading city for green roofs，with over 92,000 square meters of green rooftops.The city also launched a program called “Skip the Bag，Save the River.”Stores charge people a fivecent tax for using plastic or paper shopping bags instead of reusable bags.Money from the tax will be used to clean up a local river.
New York City is using water as a renewable energy source.For several years, the city has experimented with water in the East River to create energy.Officials operating the program recently asked for permission to put into place 30 river turbine devices.
The people of Portland, Oregon are among the top recyclers in the nation.People living there recycle over half of the waste they throw out.The city has also worked to provide green transportation by providing safe bike paths and free parking spaces where electric cars can get recharged.
In Oakland, California, you can ride on one of several public hydrogenpowered(氢气作燃料的) buses.These buses release zero pollution into the air.However，they cost about five times more than common buses.
小题1:The United States Conference of Mayors" Climate Protection Agreement is aimed at________.
| A．reducing energy use |
| B．reducing air pollution |
| C．improving public health |
| D．reusing waste materials |
| A．To clean a local lake that has been polluted. |
| B．To get enough money for the green roof project. |
| C．To prevent shoppers from using reusable bags. |
| D．To collect money for an environmental project. |
| A．building green rooftops |
| B．making transportation clean |
| C．being good at recycling waste |
| D．using renewable energy source |
A．Washington，D.C. B．New York.
C．Portland. D．Oakland.
小题5:One obvious disadvantage of adopting hydrogenpowered buses is________.
| A．its high cost | B．side effect |
| C．zero pollution | D．large space |
If you live in a place like Britain, where the weather seems to change daily if not hourly，you could be forgiven for thinking that the weather is random.In fact the weather is controlled by systems which move around areas of the globe.In the UK the weather depends on depressions (低压气流), often called lows，and anticyclones(反气旋)，also known as highs.These systems start in the Atlantic Ocean, and make their way across the British Isles from the west to the east.Highs bring sunny weather, while lows bring rain and wind.In modern times, human activities seem to be altering weather patterns.Gases produced by heavy industry change the temperature of the earth"s surface，and affect cloud formation.Some researchers say that factories in Europe and North America may have been one of the causes of the droughts in Africa in the 1980s.
The human race has always tried to guess the weather，especially in areas of the world where there are frequent changes.Traditional rhymes point to early attempts to identify weather patterns; popular poems include：
Red sky at night, shepherd"s delight；red sky in the morning, shepherd"s warning.
Flies will swarm before a storm.
Rain before 7，clear by 11.
While folk wisdom can provide a guide to help forecast weather, today"s methods of prediction increasingly rely on technology.Satellites, balloons，ships, aircrafts and weather centers with sensitive monitoring equipment, send data to computers.The data is then processed, and the weather is predicted.However，even this system cannot predict weather for longer than about a week.
小题1:When weather keeps changing，________.
| A．people become badtempered |
| B．people"s reaction slows down |
| C．people find it hard to focus on their work |
| D．people find it easy to focus on their work |
| A．random | B．moist |
| C．depressing | D．satisfying |
| A．windy | B．rainy |
| C．fine | D．snowy |
| A．Anticyclones often bring rain and wind. |
| B．Weather forecasting has been done for a long time. |
| C．Weather could never be predicted. |
| D．Modern methods of weather prediction are developed from folk wisdom. |
| A．Changes in weather. |
| B．Weather in Britain. |
| C．African droughts. |
| D．Research on weather. |
Organic mulch improves the condition of soil.As the mulch breaks down, it provides material which keeps the soil from getting hard.This improves the growth of roots and increases the movement of water through the soil.It also improves the ability of the soil to hold water. Organic mulch contains nutrients for plants.It also provides a good environment for earthworms and other helpful organisms in the soil.
It is easy to find organic mulch materials.Cutup leaves and small pieces of tree bark can be used.Grass cuttings are also a good mulch for plants. Mulch from newspapers works well in controlling weeds.
The best time to add mulch depends on your goal.Mulch provides a thick barrier between the soil and the air.This helps to reduce temperature changes in the soil. As a result，mulched soil will be cooler than other soil in the summer.In winter, the mulched soil may not freeze as deeply as other soil.The best time is after the ground has frozen, but before the coldest weather arrives.Spreading mulch before the ground has frozen may attract small animals searching for a warm place to spend the winter.Delaying the spreading should prevent this problem.The animals will probably find another place to live.
小题1:The author tells us the following EXCEPT________.
| A．what mulch is and its benefits |
| B．the best time to add mulch |
| C．what can be mulched on the soil surface |
| D．the bad effects of mulch |
| A．tree barks | B．cutup leaves |
| C．grass cuttings | D．plastic |
| A．Protecting the soil against wind and water damage. |
| B．Keeping the soil wet and reducing the need for watering plants. |
| C．Reducing temperature changes in the soil and stopping unwanted weeds growing. |
| D．All of the above. |
| A．improve the condition of soil |
| B．improve the ability of the soil to hold water |
| C．provide a good environment for earthworms |
| D．improve the growth of roots and increase the movement of water through the |
小题5:From the last paragraph, we know ________.
| A．the best time to add mulch is in spring and summer |
| B．the best time to add mulch is after the coldest weather arrives |
| C．the best time to add mulch depends on weather |
| D．choosing the best time to add mulch can avoid attracting small animals |
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