六级真题及答案Word格式文档下载.docx

1、There is no denying that ambient temperatures（环境温度） Supersize surprise Ask anyone why there is an obesity epidemic and they will have changed in the past few decades. Between 1970 and tell you that its al down to eating too much and burning too 2000, the average British home warmed from a chilly 13C

2、 to 18C. In the US, the changes have been at the other end of few calories. That explanation appeals to common sense and has dominated efforts to get to the root of the obesity the thermometer as the proportion of homes with air epidemic and reverse it/ yet obesity researchers are conditionings rose

3、 from 23% to 47% between 1978 and increasingly dissatisfied with it. Many now believe that 1997. In the southern states where obesity rates tend to be something else must have changed in our environment to highest the number of houses with air conditioning has precipitate（促成） such dramatic rises in

4、obesity over the shot up to 71% from 37% in 1978. past 40 years or so. Nobody is saying that the “big two” reduced physical activity and increased availability of food Could air conditioning in summer and heating in winter are not important contributors to the epidemic, but they really make a differ

5、ence to our weight? cannot explain it all. there is some evidence that it does-at least with Sadly，Earlier this year a review paper by 20 obesity experts set regard to heating. Studies show that in comfortable out the 7 most plausible alternative explanations for the temperatures we use less energy.

6、 epidemic. Here they are. 3.Less smoking 1. Not enough sleep Bad news: smokers really do tend to be thinner than the It is widely believed that sleep is for the brain, not the body. rest of us,and quitting really does pack on the pounds, Could a shortage of shut-eye also be helping to make us though

7、 no one isn sure why. It probably has something to fat? do with the fact that nicotine is an appetite suppressant and Several large-scale studies suggest there may be a link. appears to up your metabolic rate. People who sleep less than 7 hours a night tend to have a Katherine Flegal and colleagres

8、at the US National higher body mass index than people who sleep more, Center for Health Statistics in Hyattsville,Maryland, have according to data gathered by the US National Health and calculated that people kicking the habit have been Nutrition Examination Survey. Similarly, the US Nurses respousi

9、ble for a small but significant portion of the US Health Study, which tracked 68,000 women for 16 years, epidemic of fatness.From data collected aroud 1991 by the found that those who slept an average of 5 hours a night US National Health and Nutrition Examination Survey,they gained more weight duri

10、ng the study period than women worked out that people who had quit in the previous decade who slept 6 hours, who in turn gained more than whose were much more likely to be overweight than smokers and who slept 7. people who had never smoked .Among men, for example, nearly half of quitters were overw

11、eight compared with 37% Its well known that obesity impairs sleep, so perhaps of non-smokers and only 28%of smokers. people get fat first and sleep less afterwards. But the nurses 4. Genetic effects study suggests that it can work in the other direction too: Yours chances of becoming fat may be set,

12、at least in sleep loss may precipitate weight gain. part,before you were even born.children of boese mothers Although getting figures is difficult, it appears that we are much more likely to become obest themselves later in really are sleeping less. In 1960 people in the US slept an life.Offspring o

13、f mice fed a high-fat diet during pregnancy average of 8.5 hours per night. A 2002 poll by the National are much more likely to become fat than the offspring of Sleep Foundation suggests that the average has fallen to identical mice fed a normal diet. Intriguingly,the effect under 7 hours, and the d

14、ecline is mirrored by the increase in persists for two or three generations.Grand-children of mice obesity. fed a high-fat diet grow up fat even if their own mother is fed normally-so you fate may have been sealed even before C）New explanations for the obesity epidemic you were conceived. D）possible

15、 ways to combat the obesity epidemic 5.A little older 2. A）gained the least weight Some groups of people just happen to be fatter than B）were inclined to eat less others.surveys carried out by the US national center for C）found their vigor enhanced health statisties found that adults aged 40 to 79 w

16、ere around D）were less susceptible to illness three times as likely to be obese as younger 3. A）it makes us sleepy B）it causes sleep loss people.non-white females also tend to fall at the fatter end C）it increases our appetite of the spectreum:Mexican-american women are 30% more D）it results from la

17、ck of sleep likely than white women to be obsess,and black women 4. A）it makes us stay indoors more have twice the risk. B）it accelerates our metabolic rate In the US,these groups account for an increasing percentage of the population.between 1970 and 2000 the C）it makes us feel more energetic US po

18、pulation aged 35 to 44 grew by 43%.the proportion of D）it contributes to our weight gain Hispanic-americans also grew,from under 5% to 12.5% of 5. A）it threatens their health the population,while the proportion of black Americans B）it heightens their spirits increased from 11% to 12.3%.these changes

19、 may account in C）it suppresses their appetite part for the increased prevalence of obesity. D）it slows down their metabolism 6.mature mums 6. A）heavy smokers B）passive smokers Mothers around the world are getting older.in the UK,the C）those who never smoke mean age for aving a frist child is 27.3,c

20、ompared with 23.7 D）those who quit smoking in 1970 .mean age at frist birth in the US has also increased, 7. A）the growing number of smokers among young people rising from 21.4 in 1970 to 24.9 in 2000. This would be neither here nor there if it weret for the B）the rising proportion of minorities in

21、its population observation that having an older mother seems to be an C）the increasing consumption of high-calorie foods independent risk factor for obesity. Results from the US D）the improving living standards of the poor people national heart,lung and blood institutes study found that the 8.accord

22、ing to the US National Heart, Lung and Blood odds of a child being obese increase 14% for every five Institute, the reason why older mothers children tend to be extra years of their mothers age , though why this should obese remains not entirely clear be so is not entirely clear. 9.According to Mich

23、ael Symonds, one factor contributing Michael Symonds at the university of to the obesity epidemic is decrease of family size Nottingham,UK,found that first-bron children have more 10 when two heavy people get married, chances of their fat than younger ones. As family size decreases, firstbrons child

24、ren getting fat increase, because obesity is party account for a greather share of the population. In 1964, genetiz british women gave birth to an average of 2.95 children;by Part III 2005 that figure had fallen to 1.79. in the US in 1976, 9.6% Section A of woman in their 40s had only one chile;in 2

25、004 it was 11. A）He is quite easy to recognize 17.4%. this combination of older mothers and more single B）he is an outstanding speaker children could be contributing to the obesity epidemic. C）he looks like a movie star 7.Like marrying like D）he looks young for his age Just as people pair off accord

26、ing to looks, so they do for 12. A）consult her dancing teacher size. Lean people are more likely to marry lean an d fat B）take a more interesting class more likely to marry fat. On its own, like marrying like C）continue her dancing class cannot account for any increase in obesity. But combined D）imp

27、rove her dancing skills with others- particularly the fact that obesity is partly 13. A）the man did not believe what the woman said genetic, and that heavier people have more children-it B）the man accompanied the woman to the hospital amplifies the increase form other causes. C）the woman may be suff

28、ering from repetitive strain 1. A）effects of obesity on peoples health injury B）the link between lifestyle an obesity D）the woman may not followed the doctors instructions B. The air pressure is low. D. The sky appears 14. A）they are not in style any more brighter. B）they have cost him far too much

29、27. A. Ancient people were better at foretelling the weather. C）they no longer suit his eyesight B. Sailorssaying about the weather are unreliable. D）they should be cleaned regularly C. People knew long ago how to predict the weather. 15. A）he spilled his drink onto the floor D. It was easiter to fo

30、recast the weather in the old days. B）he has just finished wiping the floor 28 A. Weather forecast is getting more accurate today. C）he was caught in a shower on his way home B. People can predict the weather by their senses D）he rushed out of the bath to answer the phone C. Who are the real esperts in weather forecast . 16. A）fixing some furniture D. Weather changes affect peoples life remarkably B）repairing the toy train 29. A. They often feel insecure about their jobs. C）reading the instructions B. They are unable to decide what to