[外语类试卷]大学英语六级模拟试卷255及答案与解析.doc
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1、大学英语六级模拟试卷 255及答案与解析 一、 Part I Writing (30 minutes) 1 Directions: For this part, you are allowed thirty minutes to write a short essay entitled My Iden of Pop music. You should write at least 150 words following the outline given bellow. 1. 有人认为流行音乐不能 登大雅之堂。 2. 有人认为音乐无高低贵贱之分,只有兴趣上的差别。 3. 我认为 My Idea
2、 of Pop music 二、 Part II Reading Comprehension (Skimming and Scanning) (15 minutes) Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions attached to the passage. For questions 1-4, mark: Y (for YES) if the statement agrees with the information gi
3、ven in the passage; N (for NO) if the statement contradicts the information given in the passage; NG (for NOT GIVEN) if the information is not given in the passage. 1 Why Should We Worry About What We Shouldnt? It would be a lot easier to enjoy your life if there werent so many things trying to kill
4、 you every day. The problems start even before youre fully awake. Theres the fall out of bed that kills 600 Americans each year. Theres the early-morning heart attack, which is 40% more common than those that strike later in the day. Theres the fatal plunge down the stairs, the bite of sausage that
5、gets lodged in your throat, the tumble on the slippery sidewalk as you leave the house, the high-speed automotive pinball game that is your daily commute. Other dangers stalk you all day long. Will a cabbies brakes fail when youre in the crosswalk? Will you have a violent reaction to bad food? And w
6、hat about the risks you carry with you all your life? The father and grandfather who died of coronaries in their 50s probably passed the same cardiac weakness on to you. The tendency to take chances on the highway that has twice landed you in traffic court could just as easily land you in the morgue
7、. Shadowed by peril as we are, you would think wed get pretty good at distinguishing the risks likeliest to do us in from the ones that are statistical long shots. But you would be wrong. We agonize over avian flu, which to date has killed precisely no one in the U.S., but have to be cajoled into ge
8、tting vaccinated for the common flu, which contributes to the deaths of 36,000 Americans each year. We wring our hands over the mad cow pathogen that might be (but almost certainly isnt) in our hamburger and worry far less about the cholesterol that contributes to the heart disease that kills 700,00
9、0 of us annually. We pride ourselves on being the only species that understands the concept of risk, yet we have a confounding habit of worrying about mere possibilities while ignoring probabilities, building barricades against perceived dangers while leaving ourselves exposed to real ones. Six Musl
10、ims traveling from a religious conference were thrown off a plane last week in Minneapolis, Minn., even as unscreened cargo continues to stream into ports on both coasts. Shoppers still look askance at a bag of spinach for fear of E. coli bacteria while filling their carts with fat-sodden French fri
11、es and salt-crusted nachos. We put filters on faucets, install air ionizers in our homes and lather ourselves with antibacterial soap. “We used to measure contaminants down to the parts per million,“ says Dan McGinn, a former Capitol Hill staff member and now a private risk consultant. “Now its part
12、s per billion.“ At the same time, 20% of all adults still smoke; nearly 20% of drivers and more than 30% of backseat passengers dont use seat belts; two-thirds of us are overweight or obese. We dash across the street against the light and build our homes in hurricane-prone areas and when theyre demo
13、lished by a storm, we rebuild in the same spot. Sensible calculation of real-world risks is a multidimensional math problem that sometimes seems entirely beyond us. And while it may be tree that its something well never do exceptionally well, its almost certainly something we can learn to do better.
14、 Part of the problem we have with evaluating risk, scientists say, is that were moving through the modem world with what is, in many respects, a prehistoric brain. We may think weve grown accustomed to living in a predator-free environment in which most of the dangers of the wild have been driven aw
15、ay or fenced off, but our central nervous system-evolving at a glacial pace-hasnt got the message. To probe the risk-assessment mechanisms of the human mind, Joseph LeDoux, a professor of neuroscience at New York University and the author of The Emotional Brain, studies fear pathways in laboratory a
16、nimals. He explains that the jumpiest part of the brain-of mouse and man-is the amygdala, a primitive, almond-shaped clump of tissue that sits just above the brainstem. When you spot potential danger-a stick in the grass that may be a snake, a shadow around a comer that could be a mugger-its the amy
17、gdala that reacts the most dramatically, triggering the fight-or-flight reaction that pumps adrenaline and other hormones into your bloodstream. Its not until a fraction of a second later that the higher regions of the brain get the signal and begin to sort out whether the danger is real. But that f
18、raction of a second causes us to experience the fear far more vividly than we do the rational response an advantage that doesnt disappear with time. The brain is wired in such a way that nerve signals travel more readily from the amygdala to the upper regions than from the upper regions back down. S
19、etting off your internal alarm is quite easy, but shutting it down takes some doing. “There are two systems for analyzing risk: an automatic, intuitive system and a more thoughtful analysis,“ says Paul Slovic, professor of psychology at the University of Oregon. “Our perception of risk lives largely
20、 in our feelings, so most of the time were operating on system No. 1.“ Theres clearly an evolutionary advantage to this natural timorousness. If were mindful of real dangers and flee when they arise, were more likely to live long enough to pass on our genes. But evolutionary rewards also come to tho
21、se who stand and fight, those willing to take risks-and even suffer injury- in pursuit of prey or a mate. Our ancestors hunted mastodons and stampeded buffalo, risking getting trampled for the possible payoff of meat and pelt. Males advertised their reproductive fitness by fighting other males, will
22、ingly engaging in a contest that could mean death for one and offspring for the other. These two impulses-to engage danger or turn from it-are constantly at war and have left us with a well-tuned ability to evaluate the costs and payoffs of short-term risk, say Slovic and others. That, however, is n
23、ot the kind we tend to face in contemporary society, where threats dont necessarily spring from behind a bush. Theyre much more likely to come to us in the form of rumors or news broadcasts or an escalation of the federal terrorism-threat level from orange to red. Its when the risk and the consequen
24、ces of our response unfold more slowly, experts say that our analytic system kicks in. This gives us plenty of opportunity to overthink-or underthink- the problem, and this is where we start to bollix things up. Which risks get excessive attention and which get overlooked depends on a hierarchy of f
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