【文章內(nèi)容簡(jiǎn)介】 y and starts to seem a bit dreadful. You think, Am I losing it？Or worse, Is this a sign of Alzheimer39。s disease（老年癡呆癥）？ Well, don39。t worry. The fact that you recognize your own forgetfulness may be a very good sign, at least in terms of the possibility of your developing Alzheimer39。s disease（AD）. The researchers in a new study show that it39。s not forgetfulness but not being aware that we39。re forgetful that we should fear. The researchers began with the assumption that one mon feature of Alzheimer39。s disease is a damaged awareness of illness. And they wanted to prove their theory that the lack of awareness can be used to predict whether someone with mild cognitive（認(rèn)知的）damage will progress to fullon AD. For the study, mild cognitive damage was defined as someone whose mental state was considered healthy but who had either plained of memory loss or had suffered objective memory loss. The researchers used existing data for 1, 062 people between the ages of 55 and 90 that had been recorded over a 12year period. The data included brain scans, which the researchers used to look for visual signs of reduced glucose uptake（葡萄糖吸收）.It is an objective marker of the sort of reduced brain function that goes along with expected, glucose uptake was reduced in those with AD. What the researchers also discovered was that glucose uptake was reduced in those with mild cognitive damage who also showed evidence of reduced illness awareness. Finally, the researchers found that those who had reduced illness awareness were more likely to develop AD than those without.（1）What can be implied from paragraph 1？ A.People can be forgetful at different ages.B.The memory of the young is better than the old.C.Old people are most afraid of getting Alzheimer39。s disease.D.It39。s a rare phenomenon when young people forget something.（2）What statement does the researchers in the new study agree with? A.Being aware all the time is a fearful thing.B.Illness awareness has nothing to do with Alzheimer39。s disease.C.Recognizing forgetfulness doesn39。t mean developing Alzheimer39。s disease.D.Realizing forgetfulness must be a sign of developing Alzheimer39。s disease.（3）What can be a sign of developing Alzheimer39。s disease? A.Realizing others39。 forgetfulness.B.Reduced uptake of glucose.C.Having higher intake of glucose.D.Expected increase in brain function.（4）From which is the text probably taken? A.Science fiction.B.A chemistry book.C.A science research.D.A health brochure.【答案】 （1）A（2）C（3）B（4）C 【解析】【分析】本文是一篇說(shuō)明文，介紹了如何預(yù)測(cè)你的記憶喪失是否是老年癡呆癥,一項(xiàng)新的研究表明，不是遺忘，而是沒(méi)有意識(shí)到我們的健忘讓人們感到害怕。 （1）考查推理判斷。根據(jù)第一段中的“In our twenties, we find it funny when we can39。t remember our neighbor39。s cat39。s name or a handsome actor who starred in a famous movie. In our thirties, we jokingly call it ‘brain freeze’ In our forties, we laugh it off as a‘senior moment’ and follow up with one of these old age jokes. But the reality is that there es a point when being forgetful stops being funny and starts to seem a bit dreadful. ”在二十多歲的時(shí)候，當(dāng)我們記不起鄰居的貓的名字或是主演一部著名電影的英俊演員時(shí)，我們覺得很有趣。在三十多歲的時(shí)候，我們開玩笑地稱它為“大腦凍結(jié)”，在四十多歲的時(shí)候，我們把它當(dāng)作“老年時(shí)期”來(lái)嘲笑，然后繼續(xù)講這些老年笑話。但現(xiàn)實(shí)是，有這樣的時(shí)候，健忘不再有趣，而且看起來(lái)有點(diǎn)可怕，可推知選A。 （2）考查細(xì)節(jié)理解。根據(jù)第二段中的“ The fact that you recognize your own forgetfulness may be a very good sign, at least in terms of the possibility of your developing Alzheimer39。s disease（AD） ”承認(rèn)自己的健忘也許是一個(gè)很好的跡象，至少?gòu)哪慊祭夏臧V呆癥,的可能性來(lái)看，可知選C。 （3）考查細(xì)節(jié)理解。根據(jù)第四段中的“ It is an objective marker of the sort of reduced brain function that goes along with expected, glucose uptake was reduced in those with AD. ”這是一個(gè)患有老年癡呆癥降低了腦功能的客觀標(biāo)志。正如所料，老年癡呆癥患者的葡萄糖吸收降低，故選B。 （4）考查推理判斷?？v觀全文可知，是一項(xiàng)科學(xué)研究，介紹了如何預(yù)測(cè)你的記憶喪失是否是老年癡呆癥,故選C。 【點(diǎn)評(píng)】本題考點(diǎn)涉及細(xì)節(jié)理解和推理判斷兩個(gè)題型的考查，是一篇科研類閱讀，考生需要準(zhǔn)確掌握細(xì)節(jié)信息，并根據(jù)上下文進(jìn)行邏輯推理，從而選出正確答案。5．犇犇Choose the one that fits best according to the information given in the passage you have just read. Studies show that older people tend to remember the positive things in life rather than the negative things, while younger people remember the positive and negative equally well. The dominant psychological theory to explain this is that older people are aware of their limited time left, so they prioritize positive emotional experiences. But about a decade ago, I worked with biologist Robert Trivers on his idea that there was an evolutionary basis for older people39。s increased positive outlook. Our research took us in the fascinating direction of exploring how the body uses its energy. When our ancestors needed more energy than usual, perhaps while being chased by a tiger, they had to get that energy from somewhere in the body. Could they borrow it from the brain? That organ uses 20 percent of our metabolic (新陳代謝) output, whether we are solving math problems or watching television reruns. Due to this constant energy requirement, borrowing energy from the brain when our need surpasses the available supply is not an option. Perhaps we could borrow energy from our muscles. Because we use far more muscle energy when we are active than when at rest, in principle, we could borrow energy when we are sitting. But the problem is that most of the energydemanding emergencies of our ancestors required a muscular response. There was no way to borrow energy from our muscles during an emergency because relaxing when a tiger showed up was not an effective response. This brings us to our immune system, which, when strong, protects us from many illnesses and diseases. Like the brain, the immune system works at great metabolic cost, but largely in the service of keeping us healthy in the future. We have an enormous number of immune cells coursing through our body, a momentary break from production is fine. So, when our body needs extra energy, one of the places it goes is our immune function. When you39。re being chased by a tiger, you don39。t need to waste energy making immune cells to fight off tomorrow39。s cold. What you need is to shift all available energy resources to your legs, with the hope that you will live to experience another cough or sneeze. As a result, our immune system evolved to run in maximum amounts when we39。re happy, but to slow down dramatically when we39。re not. With this background in mind, Tri