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1、2022-2023年广东省云浮市大学英语6级大学英语六级真题一卷(含答案)学校:_ 班级:_ 姓名:_ 考号:_一、2.Reading Comprehension (Skimming and Scanning)(20题)1. Exploiting hydroelectric power resource can cost billions of dollars, for hydroelectric plants normally have _ .2.Obesity EpidemicAsk anyone why there is an obesity epidemic and they will
2、 say that its all down to eating too much and burning too few calories. That is undoubtedly true. But its also true that we live in an obesogenic (肥胖基因的) environment: calorific food is plentiful and cheap and our lifestyles are increasingly sedentary.Now, obesity researchers are increasingly dissati
3、sfied with such explanations. They believe that something else must have changed in our environment to cause 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
4、to the epidemic. But they cannot explain it all.Earlier this year a review paper by 20 obesity experts set out the 9 most plausible alternative explanations for the epidemic. Here they are.Not Enough SleepIt is widely believed that sleep is for the brain, not the body. Could a shortage of shut-eye a
5、lso be helping to make us fat?Several large epidemiological studies suggest there may be a link. People who sleep less than 7 hours a night tend to have a higher body mass index (BMI) than people who sleep more, according to data gathered by the US National Health and Nutrition Examination Survey. S
6、imilarly, the US Nurses Health Study found that those who slept an average of 5 hours a night gained more weight during the study period than those who slept 6 hours, who in turn gained more than those who slept 7.Its well known that obesity impairs sleep, so perhaps people get fat first and sleep l
7、ess afterwards. But the nurses study suggests that it can work in the other direction too: sleep loss may cause weight gain. One factor that could be at work here is the way sleep deprivation alters metabolism (新陈代谢). Leptin, the hormone that signals satiety (过饱), falls while ghrelin, which signals
8、hunger, rises - and this boosts appetite.Climate ControlWe humans, like all warm-blooded animals, can keep our core body temperatures pretty much constant regardless of whats going on in the world around us. We do this by altering our metabolic rate, shivering or sweating. Keeping warm and staying c
9、ool take energy.Theres no denying that surrounding temperatures have changed in the past few decades. In the US, the changes have been at the other end of the thermometer as the proportion of homes with air conditioning rose from 23 to 47 per cent between 1978 and 1997. In the southern states - wher
10、e obesity rates tend to be highest - the number of houses with air con has shot up to 70 per cent from 37 per cent in 1978.Could air conditioning in summer and heating in winter really make a difference to our weight? Sadly, there is some evidence that it does - at least with regard to heating.Less
11、SmokingBad news: smokers really do tend to be thinner than the rest of us, and quitting really does pack on the pounds, though no one is sure why. It probably has something to do with the fact that nicotine is an appetite suppressant and appears to up your metabolic rate.Katherine Flegal and colleag
12、ues at the US National Center for Health Statistics in Hyattsville, Maryland, have calculated that people kicking the habit have been responsible for a small but significant portion of the US epidemic of fatness. From data collected around 1991 by the US National Health and Nutrition Examination Sur
13、vey, they worked out that people who had quit in the previous decade were-much more likely to be overweight than smokers and people who had never smoked. Among men, for example, nearly half of quitters were Overweight compared with 37 per cent of nonsmokers and only 28 per cent of smokers.Prenatal E
14、ffectsYour chances of becoming fat may be set, at least in part, before you are even born. Children ofA.Y B.N C.NG3.Peoples confidence in reading might be destroyed by _.4.The people of Savannah offered to surrender because they did not want their city to be set on fire.A.Y B.N C.NG5.We have problem
15、 with evaluating risk partly because _.6. Lynn Joseph suggests that before considering the job research, the downsized should firstA.modify their resume to make it more attractiveB.try to get some reemployment trainingC.seek help from professional career counselorsD.get over the hurt to their feelin
16、gs caused by the layoff7.A Future vehicleWhats the Moller Skycar?While many technological advances occur in an evolutionary manner, occasionally a revolutionary technology appears on the horizon that creates startling new conditions and profound changes. Such is the case with the privately developed Moller Skycar, which is named after
