大学英语六级-226及答案解析.doc

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1、大学英语六级-226 及答案解析(总分：100.00，做题时间：90 分钟)More and more people are taking their tablet computers to bed to surf the web or check Facebook or e-mails before 1 the light. But using tablets like iPad just before bed can lead to a poor night“s sleep, according to research. Researchers are warning that the b

2、lueish light their screens 2 can stop users getting a good night“s sleep. That is because this type of light mimics daylight, convincing the brain that it is still daytime. Blue light 3 production of a brain chemical called melatonin, which helps us fall sleep. This is because our brains have 4 to b

3、e wakeful during daylight hours. By contrast, light which is more orange or red in tone does not restrain melatonin production, perhaps because our brains recognize it as a 5 that the day is ending. Neurologists have known for years that 6 screens late in the evening can disrupt sleep. Researchers a

4、t the Lighting Research Centre say: “Although turning off devices at night is the 7 solution, it is recommended that if these devices are used at night displays are dimmed as much as possible and that the time spent on them before bed should be 8 .“ They drew their conclusions after measuring melato

5、nin levels in 13 volunteers, after they had spent time 9 iPads at full brightness at a distance of 10 inches, for two hours. However, these studies tend to be 10 of those with chronic sleep disruption, such as long term shift workers, with those who have normal sleep patterns. （分数：25.00）填空项 1:_填空项 1

6、:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_Earlier studies have tied chronic sleep disorders and low levels of sleep to greater risks of heart disease and obesity, and even 11 life span. But the new study, published in the journal Hypertension , is one of the first to find that it“s n

7、ot just how much you sleep, but the 12 of your nightly slumber that can affect your risk for high blood pressure. The goal of the study, 13 by researchers at Harvard Medical School and elsewhere, was to look specifically at the slow-wave stages of sleep, which 14 about 90 minutes to two hours of a n

8、ormal night“s rest and 15 the deepest hours of sleep. To study the effect of deep sleep on health, the scientists followed 784 healthy men who were part of an 16 sleep study and did not have signs of high blood pressure at the start of the research. During the three-and-a-half year study, the men ha

9、d their blood pressure checked at various times, and their levels of slow-wave sleep were 17 at home by a machine. After controlling for a number of 18 , the researchers found that the men who spent the least time in slow-wave or deep sleep were the most likely to develop high blood pressure. Althou

10、gh a night of normal sleep should 19 about 25 percent slow-wave sleep, the men in the study who were at highest risk for hypertension managed to enjoy deep sleep for no more than 4 percent of their total sleep each night. The researchers found that the men with the least deep sleep were more likely

11、to have sleep apnea and 20 sleep less over all. （分数：25.00）填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_Up to a million people in the UK have “completely preventable“ severe headaches caused by taking too many painkillers, doctors said. They said some 21 a “vicious cycle“ of

12、taking pain relief, which then caused even more headaches. The warning came as part of the National Institute for Health and Clinical Excellence“s first guidelines for 22 headaches. There is no definitive UK data on the incidence of the condition, but studies in other countries suggest 1% to 2% of p

13、eople are affected, while the WHO says 23 closer to 5% have been reported. While painkillers would be many people“s 24 response, they could be making sufferers feel even worse. Prof. Martin Underwood, from Warwick Medical School, who led the panel, said: “This can 25 getting into a vicious cycle whe

14、re your headache gets worse, so you take more painkillers, so your headache gets worse and this just becomes worse and worse and worse.“ People with a family history of tension-type headaches or migraine (偏头痛) may also be genetically more 26 to medication overuse headaches. They could be susceptible

15、 when taking pain relief even if it is not for headaches. The new guidelines for doctors in England and Wales 27 telling sufferers to immediately stop taking all pain relief. However, this will lead to about a month of agony as patients 28 regular headaches without pain relief, until symptoms eventu

16、ally improve. Doctors have also been asked not to 29 patients for brain scans “solely for reassurance“ that they do not have a brain tumor (瘤). The panel said a tumor would come with other symptoms such as a change in, 30 or epilepsy (癫痫). （分数：25.00）填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填

17、空项 1:_填空项 1:_填空项 1:_Farms are spreading to unused city lots and old properties across the United States. These urban farms grow crops in areas where people rarely buy fresh fruits and vegetables; they also have the power to change what people eat and to 31 troubled neighborhoods. Eco City Farms is a

18、n educational nonprofit organization in Prince George County, Maryland. It seeks to 32 the community by teaching economic development, job training and a healthier way of living. The group has 33 farms in urban neighborhoods. Margaret Morgan founded Eco City Farms. Eco City Farms offer several progr

19、ams, including educational 34 on agriculture, food, and finding jobs with environmentally-friendly businesses. People can also learn how to cook healthier foods and teach others how to prepare meals. On a recent day, Philip Sidibe 35 his cooking skills. He prepared a popular food in Cameroon where h

20、e 36 . He and other young people not only cook their food, they also grow it in a large garden next to the Autumn Woods Apartments. Tameka Barbour lives there. She says her whole family is eating healthier meals because of the local produce. Morgan says the urban garden is an 37 for change and the y

21、oung people are its newest supporters. “Our program is about planting seeds. It“s not just in the ground, but in other 38 so that the movement can grow and it“s really exciting because these young people will be working with us 39 the year to help plan the actual farm and to 40 own it.“ She says thi

22、s means not only farming food, but also making that food available to people who live in the community. （分数：25.00）填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_大学英语六级-226 答案解析(总分：100.00，做题时间：90 分钟)More and more people are taking their tablet computers to bed to surf the web o

23、r check Facebook or e-mails before 1 the light. But using tablets like iPad just before bed can lead to a poor night“s sleep, according to research. Researchers are warning that the blueish light their screens 2 can stop users getting a good night“s sleep. That is because this type of light mimics d

24、aylight, convincing the brain that it is still daytime. Blue light 3 production of a brain chemical called melatonin, which helps us fall sleep. This is because our brains have 4 to be wakeful during daylight hours. By contrast, light which is more orange or red in tone does not restrain melatonin p

25、roduction, perhaps because our brains recognize it as a 5 that the day is ending. Neurologists have known for years that 6 screens late in the evening can disrupt sleep. Researchers at the Lighting Research Centre say: “Although turning off devices at night is the 7 solution, it is recommended that

26、if these devices are used at night displays are dimmed as much as possible and that the time spent on them before bed should be 8 .“ They drew their conclusions after measuring melatonin levels in 13 volunteers, after they had spent time 9 iPads at full brightness at a distance of 10 inches, for two

27、 hours. However, these studies tend to be 10 of those with chronic sleep disruption, such as long term shift workers, with those who have normal sleep patterns. （分数：25.00）填空项 1:_ （正确答案：switching off）解析： switching off 听力原文 More and more people are taking their tablet computers to bed to surf the web

28、or check Facebook or e-mails before switching off the light. But using tablets like iPad just before bed can lead to a poor night“s sleep, according to research. Researchers are warning that the blueish light their screens emit can stop users getting a good night“s sleep. That is because this type o

29、f light mimics daylight, convincing the brain that it is still daytime. Blue light suppresses production of a brain chemical called melatonin, which helps us fall sleep. This is because our brains have evolved to be wakeful during daylight hours. By contrast, light which is more orange or red in ton

30、e does not restrain melatonin production, perhaps because our brains recognize it as a cue that the day is ending. Neurologists have known for years that staring at screens late in the evening can disrupt sleep. Researchers at the Lighting Research Centre say: “Although turning off devices at night

31、is the ultimate solution, it is recommended that if these devices are used at night displays are dimmed as much as possible and that the time spent on them before bed should be limited.“ They drew their conclusions after measuring melatonin levels in 13 volunteers, after they had spent time viewing

32、iPads at full brightness at a distance of 10 inches, for two hours. However, these studies tend to be comparisons of those with chronic sleep disruption, such as long term shift workers, with those who have normal sleep patterns. 解析 根据空格所在位置及空格前的 before可知，空格处应填入动词(词组)的-ing 形式。结合录音可填入 switching off，意

33、为“关上”。 填空项 1:_ （正确答案：emit）解析： emit解析 根据空格所在位置可知，空格处应填入动词(词组)。结合录音可填入 emit，意为“发出”。拼写单词时应注意单词开头为 e，不要误写为 a。 填空项 1:_ （正确答案：suppresses）解析： suppresses解析 根据空格所在位置可知，空格处应填入谓语动词(词组)。结合录音可填入suppresses，意为“抑制”。拼写单词时应注意双写字母 p及使用动词的第三人称单数形式。 填空项 1:_ （正确答案：evolved）解析： evolved解析 根据空格所在位置可知，空格处应填入动词(词组)。结合录音可填入 evo

34、lved，意为“进化”。 填空项 1:_ （正确答案：cue）解析： cue解析 根据空格前的 a可知，空格处应填入名词(词组)。结合录音可填入 cue，意为“暗示”。 填空项 1:_ （正确答案：staring at）解析： staring at解析 根据空格所在位置可知，空格处应填入从句的主语。结合录音可填入 staring at，意为“盯着”。拼写单词时应注意去掉 stare词尾的 e加-ing。 填空项 1:_ （正确答案：ultimate）解析： ultimate解析 根据空格所在位置可知，空格处应填入形容词修饰 solution。结合录音可填入ultimate，意为“首要的”。 填

35、空项 1:_ （正确答案：limited）解析： limited解析 根据空格所在位置及句意可知，空格处应填入动词(词组)的过去分词形式构成被动语态。结合录音可填入 limited，意为“被限制”。 填空项 1:_ （正确答案：viewing）解析： viewing解析 根据空格前的 spent可知，空格处应填入动词(词组)的-ing 形式。结合录音可填入 viewing，意为“看”。 填空项 1:_ （正确答案：comparisons）解析： comparisons解析 根据空格所在位置可知，空格处应填入名词(词组)。结合录音可填入comparisons，意为“对照”。 Earlier st

36、udies have tied chronic sleep disorders and low levels of sleep to greater risks of heart disease and obesity, and even 11 life span. But the new study, published in the journal Hypertension , is one of the first to find that it“s not just how much you sleep, but the 12 of your nightly slumber that

37、can affect your risk for high blood pressure. The goal of the study, 13 by researchers at Harvard Medical School and elsewhere, was to look specifically at the slow-wave stages of sleep, which 14 about 90 minutes to two hours of a normal night“s rest and 15 the deepest hours of sleep. To study the e

38、ffect of deep sleep on health, the scientists followed 784 healthy men who were part of an 16 sleep study and did not have signs of high blood pressure at the start of the research. During the three-and-a-half year study, the men had their blood pressure checked at various times, and their levels of

39、 slow-wave sleep were 17 at home by a machine. After controlling for a number of 18 , the researchers found that the men who spent the least time in slow-wave or deep sleep were the most likely to develop high blood pressure. Although a night of normal sleep should 19 about 25 percent slow-wave slee

40、p, the men in the study who were at highest risk for hypertension managed to enjoy deep sleep for no more than 4 percent of their total sleep each night. The researchers found that the men with the least deep sleep were more likely to have sleep apnea and 20 sleep less over all. （分数：25.00）填空项 1:_ （正

41、确答案：reduced）解析： reduced 听力原文 Earlier studies have tied chronic sleep disorders and low levels of sleep to greater risks of heart disease and obesity, and even reduced life span. But the new study, published in the journal Hypertension , is one of the first to find that it“s not just how much you sle

42、ep, but the quality of your nightly slumber that can affect your risk for high blood pressure. The goal of the study, carried out by researchers at Harvard Medical School and elsewhere, was to look specifically at the slow-wave stages of sleep, which make up about 90 minutes to two hours of a normal

43、 night“s rest and represent the deepest hours of sleep. To study the effect of deep sleep on health, the scientists followed 784 healthy men who were part of an ongoing sleep study and did not have signs of high blood pressure at the start of the research. During the three-and-a-half year study, the

44、 men had their blood pressure checked at various times, and their levels of slow-wave sleep were monitored at home by a machine. After controlling for a number of variables, the researchers found that the men who spent the least time in slow-wave or deep sleep were the most likely to develop high bl

45、ood pressure. Although a night of normal sleep should consist of about 25 percent slow-wave sleep, the men in the study who were at highest risk for hypertension managed to enjoy deep sleep for no more than 4 percent of their total sleep each night. The researchers found that the men with the least

46、deep sleep were more likely to have sleep apnea and tended to sleep less over all. 解析 根据空格所在位置可知，空格处应填入形容词修饰 life span。结合录音可填入 reduced，意为“减少的”。 填空项 1:_ （正确答案：quality）解析： quality解析 根据空格所在位置可知，空格处应填入名词(词组)。结合录音可填入 quality，意为“质量”。 填空项 1:_ （正确答案：carded out）解析： carded out解析 根据空格所在位置及句意可知，空格处作为插入语修饰空格前的 study，故空格处应填入动词(词组)的非谓语形式。结合录音可填入 carried out，意为“被实施”。 填空项 1:_ （正确答案：make up）解析： make up解析 根据空格所在位置可知，空格处应填入动词(词组)作从句的谓语。结合录音可填入 make up，意为“组成”。 填空项 1:_ （正确答案：represent）解析： represent解析 根据空格所在位置可知，空格处应填入动词(词组)。结合录音可填入represent，意为“代表”