【正文】 e 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. When it was tested on a backpack, the accuracy rate topped 95 percent. But the accuracy dropped to about 90 percent when objects inside bags are wrapped. And the tech could save lives if used in museums, stadiums, theme parks or schools, the team said, noting its design can inspect bags or luggage without being an exposure to privacy.s a growing need for that now. In large public areas, it39。s in airports. Manpower is always needed to check bags and we want to develop a method to try to reduce manpower.”The function of the technique.The way the device works.C.D.s the advantage of the device? A.It passes through bags without damaging them.C. signals.D.To save money and labour.B.To protect passengers39。To research dangerous objects.（4）Which of the following can replace the underlined word “ameliorating in the last paragraph? A.Improving.C.Examining.【答案】 （1）B（2）D（3）A（4）B 【解析】【分析】本是一篇說明文，介紹了研究人員發(fā)現(xiàn)，WiFi可用于可用于安檢。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。 （2）考查細節(jié)理解。 （3）考查推理判斷，根據(jù)第五段中的“In large public areas, it39。s in airports. Manpower is always needed to check bags and we want to develop a method to try to reduce manpower.”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。根據(jù)最后一段中的“Future work will continue to focus on ameliorating the accuracy of identifying objects and imaging shapes and volumes”今后的工作將繼續(xù)側重于提高識別物體和成像形狀及體積的準確性，故選B。3．犇犇閱讀理解 t just good for your health. It39。 What we found is that impacts vary across nations, but in the high173。t mention explicitly—or most of them don39。s sort of fairly clear across all the high173。 The food we eat takes a big toll on the environment. A third of the ice173。caused greenhouse gas emissions. Fertilizer runoff also leads to other problems, like the algae blooms in Lake Eerie and the Dead Zone in the Gulf of Mexico.s partly due to cow farts. Seriously.) Following the suggestions would also mean eating fewer calories, since many people here eat more than they need.ine countries, Behren39。 Of course, people are notoriously bad at following diets. But: These nationally remended guidelines do actually have a knock173。m developing a new healthy173。for173。s going to be based off a lot of detail that I get from the nationally remended guidelines. So while it might not necessarily be the case that people follow directly …they actually are quite influential on the preparation of other advice. Following a nationally remended diet can have similar impacts in different countries.B.Not all the countries have remended diets in an explicit manner.D.ine nations don39。in paragraph 3 probably mean? A.B.C.D.Food production can lead to about 20 percent of human173。free land used.B.Paul Behrens39。Some wealthy countries tend to reduce meat and dairy though the other areas of policy making isn39。通過膳食指南，似乎可以減輕對環(huán)境的傷害，人類自己也可以過上健康的生活，二者可以兼得。根據(jù)第二段中的 What we found is that impacts vary across nations, but in the high173。t mention explicitly—or most of them don39。由此推斷出 并非所有國家都以明確的方式推薦飲食 ，這個觀點Paul Behrens會贊成，故選C。根據(jù)第三段中的“A third of the ice173。caused greenhouse gas emissions. Fertilizer runoff also leads to other problems, like the algae blooms in Lake Eerie and the Dead Zone in the Gulf of Mexico.”地球上三分之一的無冰區(qū)被用于農業(yè)生產(chǎn)，根據(jù)一些估算，食物生產(chǎn)大約占到了人類造成的溫室氣體排放量的五分之一。由此推斷出劃線詞所在的句子意思是我們所吃的食物給環(huán)境帶來了巨大代價。 （3）考查細節(jié)理解。free land on Earth is used for agriculture, and according to some estimates, producing food accounts for roughly a fifth of all human173。由此可知。 【點評】本題考點涉及細節(jié)理解，詞義猜測和推理判斷三個題型的考查，是一篇科研類閱讀，要求考生準確捕捉細節(jié)信息，同時根據(jù)上下文進行邏輯推理，從而選出正確答案。 A good disguise keeps you hidden, right? Well, sometimes the best disguise is actually the most dazzling because research reveals that flashy metallic iridescence(金屬彩虹色) can visually puzzle predators, which allows colorful prey to survive another day. Those surprising results appear in the journal Scientific Reports.s viewed, is favored by everything from birds to beetles and blossoms to butterflies.But iridescence also shows up in situations where reproduction is not an issue. So what we are studying now is whether natural selection imposed by predation(捕食行為) could explain the occurrence of iridescence in prey animals. catching colors could be used as a cover173。t a new one. The father of camouflage theory, Abbott Thayer, really believed that iridescence should be categorized as a camouflage strategy. And he wrote in his famous lifework Concealing173。brilliantly changeable or metallic colors are among the strongest factors in an animal39。. And this sounds like a pletely unreasonable thing to say, because how can colors that are both brilliant and changeable contribute to animal39。 In a similar way, we were asking whether iridescence, due to its changeability, could work as a form of camouflage by preventing shape recognition. Kjernsmo and her colleagues trained bumblebees to associate a particular shape—a circle or an oval—with a sugar reward. And they found that the bees, when given a choice, would preferentially visit the shape they knew to be sweet. But when the shapes were iridescent, the bees had trouble telling them apart. It seemed that the strikingly iridescent surfaces on our targets visually broke up the otherwise recognizable shape of the targets, which made them hard to distinguish. As for making use of this method for hiding in plain sight, Any practical applications is of course directly linked to any industry that has an interest in camouflage, that is how to conceal objects or make