2021-2022年山东省潍坊市大学英语6级大学英语六级重点汇总（含答案）学校:_ 班级:_ 姓名:_ 考号:_一、2.Reading Comprehension (Skimming and Scanning)(20题)1._ is the best interpreter of your time in dreamland.2.Smog is caused by chemical reactions between pollutants derived from different sources, primarily automobile exhaust and industrial emissions.A.Y B.N C.NG3.SleepSleep is one of those funny things about being a human beingyou just have to do it. Have you ever wondered why? And what about the crazy dreams, tike the one where a bad person is chasing you and you cant run or yell. Does that make any sense?Characteristics of SleepWe all know how sleep lookswhen we see someone sleeping, we recognize the following characteristics:-If possible, the person will lie down to go to sleep.-The persons eyes are closed.-The person doesnt hear anything unless it is a loud noise.-The person breathes in a slow, rhythmic pattern.-The persons muscles are completely relaxed. If sitting up, the person may fall out of his or her chair as sleep deepens.-During sleep, the person occasionally rolls over or rearranges his or her body. This happens approximately once or twice an hour. This may be the bodys way of making sure that no part of the body or skin has its circulation cut off for too long a period of time.In addition to these outward signs, the heart slows down and the brain does some pretty frightening things.In other words, a sleeping person is unconscious to most things happening in the environment. The biggest difference between someone who is asleep and someone who has fainted or gone into a coma is the fact that a sleeping person can be aroused if the stimulus is strong enough. If you shake the person, yell loudly or flash a bright light, a sleeping person will wake up.For any animal living in the wild, it just doesnt seem very smart to design in a necessary eight-hour period of near-total unconsciousness every day. Yet that is exactly what evolution has done. So there must be a pretty good reason for it!Who Sleeps?Reptiles(爬行动物), birds and mammals all sleep. That is, they become unconscious to their surroundings for periods of time. Some fish and amphibians reduce their awareness but do not ever become unconscious like the higher vertebrates(脊椎动物) do. Insects do not appear to sleep, although they may become inactive in daylight or darkness.By studying brainwaves, it is known that reptiles do not dream. Birds dream a little. Mammals all dream during sleep.Different animals sleep in different ways. Some animals, like humans, prefer to sleep in one long session. Other animals (dogs, for example) like to sleep in many short bursts. Some sleep at night, while others sleep during the day.Sleep and the BrainIf you attach an electroencephalograph(脑电图仪) to a persons head, you can record the persons brainwave activity. A waking and relaxed person generates alpha waves, which are consistent vibrations at about 10 cycles per second. An alert person generates beta waves, which are about twice as fast.During sleep, two slower patterns called theta waves and delta waves take over. Theta waves have oscillations in the range of 3.5 to 7 cycles per second, and delta waves have oscillations of less than 3.5 cycles per second. As a person falls asleep and sleep deepens, the brainwave patterns slow down. The slower the brainwave patterns, the deeper the sleepa person deep in delta wave sleep is hardest to wake up.REM SleepAt several points during the night, something unexpected happensrapid eye movement (REM) sleep occurs. Most people experience three to five intervals of REM sleep per night, and brainwaves during this period speed up to awake levels. If you ever watch a person or a dog experiencing REM sleep, you will see their eyes flickering back and forth rapidly. In many dogs and some people, arms, legs and facial muscles will twitch(抽搐) during REM sleep. Periods of sleep other than REM sleep are known as NREM (non-REM) sleep.REM sleep is when you dream, ffA.Y B.N C.NG4.Newton was never a good student and had never finished his university studies.A.Y B.N C.NG5.Learn to be more creative is just a matter of focusing on the endless flow of ideas you produce, and learning to _ the new thats within you.6.Flirt With SuicideThe life of David Woods was the stuff of an Australian boys dream. He played professional rugby league football in a country that treats athletes as, idols. At 29, he had a loving family, a girlfriend, a 3-month-old baby, plenty of money, everything to live for. And for inexplicable reasons, nothing to live for. On New Years Eve, Woods called his mother to announce that he had signed a new contract with his team, Golden Coast, recalls his elder brother, Tony. The next morning, he ran a hose from the exhaust pipe to the window of his Mitsubishi sedan (轿车) and gasses himself. His family still has no idea why.The