专业英语八级（阅读）模拟题2019年(14)
qq飞车怎么解除情侣关系(总分100,考试时间155分钟)
PART II READING COMPREHENSION
SECTION A MULTIPLE-CHOICE QUESTIONSIn this ction there are veral passages followed by fourteen multiple-choice questions. For each multiple-choice question, there are four suggested answers marked [A] , [B], [C] and [D]. Choo the one that you think is the best answer.
阅读笔记的格式 (1)Sometimes, medical science makes breakthroughs that almost no-one **ing. Other times, it just ems to catch up with what ordinary people have known intuitively for generations. Though the latest finding from the University of New South Wales falls into the cond category, that doesn't diminish its significance. Having pored over thousands of pages of data, rearchers are now all but convinced that by exercising their brains people can substantially reduce their risk of dementia(痴呆).
(2)Scientists have conducted veral hundred studies of the theory that brain rerve—the effect of formal education and mentally challenging work and leisure pursuits—may, through some mechanism not fully understood, protect people against dementia. Aware that the studies had tosd up contradictory results, University of N.S.W. neuroscientist Michael Valenzuela and colleague Perminder Sachdev last year conducted the first systematic review of rearch on brain rerve. Having integrated data from 22 studies of possible links between people's behavior and their subquent brain health, the pair bring down their verdict in a paper about to be published in British journal Psychological Medicine. In short, they say, people with high brain rerve have almost half as much risk of developing dementia as tho with low brain rerve. In one n the brain appears to be no different from the muscles of the body, says Valenzuela: "It's a ca of u it or lo it."桉柠蒎肠溶软胶囊危害
(3)Prevention is crucial with dementia, as medicines do no more than alleviate the symptoms for the 200,000 sufferers in Australia and New Zealand. The **mon type of dementia, Alzheimer's Dia, is characterized by the spread of sticky plaques(斑块)and
clumps of tangled fiber that **munication between brain cells. Gradually robbing people of their memory, personality and eventually all cognitive function, it typically kills within 5 to 10 years. While most experts presume that aerobic exerci protects people from dementia by maintaining good blood flow to the brain, how mental exerci could help is still a puzzle. "There are a lot of theories," says Valenzuela, "but it's very difficult to pinpoint a single neurobiological characteristic that distinguishes people with high brain rerve from tho with low brain rerve. I think that's been part of the problem: we've been looking for a magic bullet." Instead, Valenzuela assumes that mental activity alters the central nervous system in different ways at various levels. Rearch on mice, he says, shows that a highly stimulating environment increas both the production of new brain and nerve cells and the density of blood vesls around them. A few years ago, Valenzuela headed a project in which a group of elderly Sydney residents had their brains analyzed before and after five weeks of memory training. Investigators found that the exercis induced biochemical changes that were the opposite of what occurs when Alzheimer's takes hold.
(4)That finding still excites Valenzuela becau it suggests that even tho people who've had their minds in low gear for most of their lives **pensate with a late burst of effort. "It ems you can make up for whatever education or job history you may have," he says. "You're not locked into some dementia destiny."
(5)But there's much we still don't know about the relationship between brain rerve and dementia. No one can yet say for sure whether an elderly person's disinclination to mental exerci is a cau or a symptom of the dia. There's also uncertainty about whether high brain rerve helps prevent Alzheimer's plaques and tangles from forming, or whether it minimizes their impact or both. It's possible that high brain rerve fosters unusually sturdy neurons(神经细胞)that allow the brain to carry on as usual despite the prence of plaques. Autopsies of Alzheimer's sufferers confirm no neat correlation between the extent of plaques and tangling and the verity of symptoms. "After almost 100 years of rearch," says Valenzuela, "we still don't understand the fundamental link between the neurobiological changes and the expression of dia."
垃圾分类简介1. According to the passage, the implication of the rearch conducted by Valenzuela and Sachdev is that_____.
A. the more we u our brains, the less chances we get dementia
B. mental activity alters the central nervous system in different ways
C. people with large brain rerve are more likely to suffer dementia
D. brain **es from education, challenging work and pastime
2. Which of the following is NOT one of the symptoms of Alzheimer's Dia?
瘦肉鸡蛋汤
阅读记录怎么写A. Slow reaction.
B. Memory decline.
C. Collap of mobility.
D. Individuality disorder.
3. From the passage, which of the following statements is NOT true?
A. Aerobic exerci is an approach to protect people from dementia.
李健吾B. Dementia is still an incurable dia nowadays.
C. Elderly people get dementia becau of little mental exerci.
D. Mental exerci would be beneficial to avoiding dementia.练舞蹈
