【文章內(nèi)容簡介】 d 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】本文是一篇說明文，介紹了如何預(yù)測你的記憶喪失是否是老年癡呆癥,一項新的研究表明，不是遺忘，而是沒有意識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，我們覺得很有趣。在三十多歲的時候，我們開玩笑地稱它為“大腦凍結(jié)”，在四十多歲的時候，我們把它當(dāng)作“老年時期”來嘲笑，然后繼續(xù)講這些老年笑話。但現(xiàn)實是，有這樣的時候，健忘不再有趣，而且看起來有點可怕，可推知選A。 （2）考查細節(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） ”承認自己的健忘也許是一個很好的跡象，至少從你患老年癡呆癥,的可能性來看，可知選C。 （3）考查細節(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，是一項科學(xué)研究，介紹了如何預(yù)測你的記憶喪失是否是老年癡呆癥,故選C。 【點評】本題考點涉及細節(jié)理解和推理判斷兩個題型的考查，是一篇科研類閱讀，考生需要準確掌握細節(jié)信息，并根據(jù)上下文進行邏輯推理，從而選出正確答案。5．犇犇閱讀理解 Hacking isn39。t just for puters and smartphones, According to a study published last week in the journal Science, scientists have found a way to hack a plant39。s genes in order to make it use sunlight more quickly. Someday, the results could increase the amount of food produced around the world. Photosynthesis（光合作用）is the word used to describe how plants use sunlight, water, and carbon dioxide to make their own food. Scientists who conducted the new study say this is a very slow process. Plants use less than 1 percent of the energy available to therm. But by hacking a plant39。s genes, the scientists were able to increase the amount of leaf growth on plants between 14 and 20 percent. Specifically, scientists hacked the plant39。s protective system. Normally, this system is activated when a plant gets too much sunlight, said scientist Krishna Niyogi, coauthor of the study. When the plant senses the light, it gets rid of extra energy and creates more leaves. When the plant is in shade, the protective system is turned off, but the process is slow. Stephen Long is the lead author of the study. He pared a plant39。s protective system to lightadjusting glasses. When a person wears the glasses outside during the day, the lenses（鏡片）darken and lighten depending on how sunny it is. Plants do the same thing, he said. But in plants the adjustment can take anywhere from 10 minutes to an hour. This makes it hard for plants to get the right amount of sunlight needed to create food. The new study sped up the process. By changing the plant39。s genes, the protective system turned on and off more quickly than normal. As a result, leaf growth on the plants scientists used in the study increased. Leaf growth in two plants increased by 20 percent, while leaf growth on a third plant increased by 14 percent. Scientists conducted the study on tobacco plants. But they think the genetic changes will produce the same results in corn and rice. （1）What will happen to the plants when scientists change plants39。 genes？ A.They will bee weaker and weaker.B.They will grow fast to produce more food.C.They will have more beautiful flowers.D.They will depend less on sunlight.（2）Why does the author mention lightadjusting glasses？ A.To warn people of the hot and bright sun.B.To explain the principle of plants39。 protective system.C.To help leaves of the plants absorb sunlight.D.To serve the science experiment smoothly.（3）In the future, the genetic changes will be used to. A.improve tobacco plants39。 qualityB.increase tobacco plants39。 leaves and rootsC.improve the flowers39。 living timeD.increase the production of corn and rice（4）Which of the following can be the theme of this text？ A.Hacking plants for more productionB.Leaf growing more quicklyC.Double production of tobacco plantsD.Photosynthesis and production【答案】 （1）B（2）B（3）D（4）A 【解析】【分析】本文是一篇說明文，科學(xué)家通過改變植物的基因，加快光合作用的速度，使植物葉子生長迅速，從而提高植物產(chǎn)量。 （1）考查細節(jié)理解。根據(jù)第一段中的“ scientists have found a way to hack a plant39。s genes in order to make it use sunlight more quickly. Someday, the results could increase the amount of food produced around the wor