【正文】 加關(guān)注生活中積極的事物，是為了增強他們的免疫功能。選C。因此，當(dāng)我們的身體需要額外的能量時，（我們的身體）會去找免疫系統(tǒng)。 （1）考查推理判斷。十年前作者與生物學(xué)家羅伯特D.Age, health and happinessC.Being negative drains energy from our body, lowering resistance to disease.（4）Which of the following is the best title of the passage? A.Our ancestors evolved their immune systems in fighting against fierce animals.C. study? A.D.immune function and healthB.brain will satisfy it by sharing optional metabolic output（2）In paragraph 3 this relationship most probably refers to the one between ______. A.organs will speed up metabolic processes to answer itC.re not. With this background in mind, Trivers supposed that older people evolved a strategy of turning this relationship on its head, being more focused on the positive things in life in an effort to enhance their immune functioning. This was helped along by their knowing much more about the world than younger adults, so they can deal with some of the unpleasant things in life more easily.（1）According to Robert Trivers, when our body needs extra energy, ______. A. As a result, our immune system evolved to run in maximum amounts when we39。t need to waste energy making immune cells to fight off tomorrow39。 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。 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。 【點評】本題考點涉及細(xì)節(jié)理解，詞義猜測，推理判斷和段落大意四個題型的考查，是一篇科研類閱讀，要求考生在捕捉細(xì)節(jié)信息的基礎(chǔ)上，進一步根據(jù)上下文的邏輯關(guān)系，進行分析，推理，概括和歸納，從而選出正確答案。 （4）考查詞義猜測。在大型公共場所，很難像機場那樣設(shè)置昂貴的安檢設(shè)施。s hard to set up expensive screening equipment like what39。根據(jù)第四段中的“noting its design can inspect bags or luggage without being an exposure to privacy.”可知，不用打開和檢查人們的個人物品，避免了侵犯隱私，可知選D?？芍xB。 （1）考查段落大意。D.Discovering.B.Confirming.D. privacy.To make full use of WiFi.C.It protects personal information from being disturbed.（3）Why did the researchers study the device according to Yingying Chen? A.It uses antennas to pick up networks39。It saves people in danger of natural disasters.B.The benefit of the study findings.（2）What39。The principle the study is based on.B. 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, researchers said.（1）What does paragraph 3 talk about? A.s hard to set up expensive screening equipment like what39。 It uses channel state information (CSI) that is readily available in lowcost WiFi devices. This could have a great impact on protecting the public from dangerous objects, said Yingying Chen, a coauthor of the study, There39。 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. A study found wireless signals are able to pass through bags and suitcases to judge the sizes of dangerous metal objects and identify them. These items could include weapons, chemicals, laptops and batteries for bombs, the research team said on Tuesday. 【點評】本題考點涉及段落大意，詞義猜測和推理判斷三個題型的考查，是一篇科普類閱讀，要求考生根據(jù)上下文的邏輯關(guān)系，進行分析，推理，概括和歸納，從而選出正確答案。”可知，作者接下來可能會告訴我們“如何全面擴大5G覆蓋。t concentrated only in big cities.”但是不要太激動。t get too excited. There39。 （4）考查推理判斷?！?可知，我們可以從文中推斷，科技公司將面臨智能手機可能被取代的事實。 （3）考查推理判斷。根據(jù)第二段中的“and that is to say, it is a sign of tim”也就是說，這是時間的標(biāo)志，”可知，劃線詞的意思是“標(biāo)志，象征”。”故選A。re moving closer and closer to 5G world.”緩慢但肯定的是，我們離5G世界越來越近了。 （1）考查段落大意。t concentrated in big cities.D.Smart glasses will bee faster and lighter.C.Tech panies will face the fact that smartphones may be replaced（4）What will the author probably tell us next? A.5G helps to create the artificial intelligence vehicleC.5G world won39。D.Symbol.B.Exhibition.The difference between 4G and 5G.D.The lightingfast speed of 5G.B.s still a lot of work to be done in the meantime,