2008年12月(09年1月)六级真题答案(A卷).pdfVIP

英语六级考试网 为您备考英语六级考试提供助力 Part I writing (30 minutes) How to improve students mental health 1、 大学生的心理健康十分重要 2 、 因此，学校可以 3 、 我们自己应当 注意：此部分试题在答题卡 1 上 Part II Reading Comprehension (Skimming and scanning) (15 minutes) Supersize surprise Ask anyone why there is an obesity ep idemic and they will tell you that it ’s al down to eating too much and burning too few calories. That explanation appeals to commonsense and has dominated efforts to get to the root of the obesity epidemic and reverse it/ yet obesity researchers are increasingly dissatisfied with it. Many now believe that something else must have changed in our environment to precipitate( 促成 ) such dramatic rises in obesity over the past 40 years or so. Nobody is saying that the “big two ” – reduced physical activity and increased availability of food – are not important contributors to the epidemic, but they cannot explain it all. Earlier this year a review paper by 20 obesity experts set out the 7 most plausible alternative explanations for the epidemic. Here they are. 1. Not enough sleep It is widely believed that sleep is for the brain, not the body. Could a shortage of shut-eye also be helping to make us fat? Several large-scale studies suggest there may be a link. People who sleep less than 7 hours a night tend to have a higher body mass index than people who sleep more, according to data gathered by the US National Health and Nutrition Examination Survey. Similarly, the US Nurses ’ Health Study, which tracked 68,000 women for 16 years, found that those who slept an average of 5 hours a night gained more weight during the study period tha