【正文】 xygen, but the scale of the drop calls for urgent attention. Oxygen levels in some tropical (熱帶的) regions have dropped by an astonishing 40 percent in the last 50 years, some recent studies reveal. Levels have dropped less significantly elsewhere, with an average loss of 2 percent globally.作者開頭提出老年人更關注積極的事情，后文提到積極的情緒會增強免疫系統(tǒng)，所以本文主要講的是年齡，健康與積極的情緒之間的關系，選B。re not.可知當我們快樂時，我們的免疫系統(tǒng)進化到最大程度，但是當我們不快樂時，免疫系統(tǒng)會減弱。也就是說積極與免疫功能之間有關系，越積極，免疫功能越強，就能活得越久，所有選項中D項（樂觀與壽命）之間最切題，故選D。由此可以推斷，免疫系統(tǒng)會暫時停止來為身體提供額外的能量。特里弗斯合作研究身體是如何使用能量的，他們的發(fā)現(xiàn)解釋了這一現(xiàn)象。Ancestors, emergency and evolutionRealizing that their days are numbered, older people prefer being positive.D.optimism and length of life（3）What can be concluded from Robert Trivers39。happiness and biological evolutionC.experiences and related knowledgemuscles will respond to it by relaxing a little bitB.re being chased by a tiger, you don39。s increased positive outlook. Our research took us in the fascinating direction of exploring how the body uses its energy.4．犇犇Choose the one that fits best according to the information given in the passage you have just read. 檢查行李總是需要人力，我們希望開發(fā)一種互補的方法來減少人力，可推知選A。 （3）考查推理判斷，根據(jù)第五段中的“In large public areas, it39。根據(jù)第三段中的“The detection system analyzes what happens when wireless signals go through and bounce off objects or materials.”這個檢測系統(tǒng)分析信號在物體和材料上穿透和反射時會發(fā)生什么。C.Improving.To protect passengers39。To save money and labour.It passes through bags without damaging them.C.D.The way the device works.C.The function of the technique.s in airports. Manpower is always needed to check bags and we want to develop a method to try to reduce manpower.” Research suggested that WiFi can now be used to estimate the volume of liquids such as water, acid, alcohol and other chemicals for explosive material. The study led by researchers at the Wireless Information Network Laboratory (WINLAB) in the School. of Engineering showed a wireless device with two to three antennas(天線)that could be fitted in existing WiFi networks.C項正好與主旨句呼應，故選C。所以說，相較于老年人，年輕人的大腦花費更少的時間來處理信息。故選B。故選A。The Older, the FasterD.Old people have fewer things to do than young people.D.D.C.B.Rapid fire abilities.（2）What is unavoidable in the process of getting old? A.re happening more quickly.（1）What causes time to fly faster as we get old? A. abilities of the young brain allow us to process more information during youth, causing the days to seem longer earlier in life. However, as we get old, researchers say the older brain takes more time to process information. 【點評】本題考點涉及細節(jié)理解，推理判斷和主旨大意三個題型的考查，是一篇科普類閱讀，考生需要準確捕捉細節(jié)信息，同時根據(jù)上下文進行邏輯推理，概括歸納，從而選出正確答案。根據(jù)最后一段中的“But if the foldable device isn39。這是一個很少有人能負擔得起的價格。 （3）考查細節(jié)理解?！斑@是一塊空白的畫布，我們可以一起做一些美好的事情。故選B?！?（1）考查主旨大意。B.Worried.They are inconvenient to carry.C.The Galaxy Fold still has many problems.C.D. the only question is when and by whom.（1）What can be the best title for the text? A. t it be great if there were a phone with the powers of a tablet that could be folded up and fit neatly into the hand?s Huawei both launched foldable phones, the Galaxy Fold and Huawei Mate X respectively. Mobile phone use has entered the foldable future, The Verge noted.re the bination of a small tablet and smartphone, all in a single device.s a blank canvas (畫布) for us to do something beautiful together. he said.s a price that few people will be able to afford.t going to change the world overnight, there is no doubt that it is ing. Patrick Moorhead, an industry analyst told The Verge, Few are debating if foldable or rollable mobile displays are the future of smartphones。Possible powers of a tablet.The foldable screen has great potential.B.They are easy to break.B.s attitude toward the future of the foldable screen? A.Unconcerned.【答案】 （1）B（2）A（3）D（4）C 【解析】【分析】本文是一篇說明文，介紹了“可折疊手機的時代即將到來?？芍疚闹黝}是“可折疊手機的時代即將到來。s a blank canvas (畫布) for us to do something beautiful together.’” Justin Denison稱可折疊屏幕是“未來智能手機的基礎”?！惫蔬xA。例如華為Mate X的價格是17500元人民幣。 （4）考查推理判斷。故選C。rapid fire39。 The new finding put forward by a Duke University researcher was published in a paper in the journal European Review this week According to Adrian Bejan, the J. A Jones Professor of Mechanical Engineering at Duke, the physical changes of our nerves and neurons play, a major role in our perception (知覺) of time as we get old. Over the years these structures bee more plex and eventually begin to degrade.re processing images at a faster rate, Beian says, For older people, this means fewer images are being processed in the same amount of time, causing experiences to seem as though they39。The electrical signals.D.The younger brain takes less time to process information.C.Time Flies FastC.根據(jù)第一段中的 This is likely due largely to the physical changes of our nerves and neurons (神經元).可知，老年人覺得時間過得過快的原因是神經和神經元的變化。ve got your aging brain to blame.和第二段中的Over the years, these structures bee more plex and eventually begin to degrade.可知，隨著年齡的增長，不可避免的就是大腦結構的老化。當我們變老的時候，大腦需要更多的時間來處理信息。文章首句點明了文章談論中心：為什么隨著我們變老，我們會覺得時間過得更快？后面文章主要解釋了原因：老年人因為大腦退化，神經元的變化導致他們覺得時間過得較快。 The detection system analyzes what happens when wireless signals go through and bounce off objects or materials. The approach, which the paper states, works by separating the wireless interference(干擾)caused by two factors of objectsthe material and shape. Most dangerous objects such as weapons are usually metal or liquid, which have significant interference, researchers said.s hard to set up expensive screening equipment like what39。 The peerreviewed study, which recently won a best paper award at the 2018 IEEE Conference on Communications and Network Security, is now published online. Future work will continue to focus on ameliorating the accuracy of identifying objects and imaging shapes and volumes, researc