【正文】 ecosystems more biologically diverse and healthy. In this documentary, biologist Aaron Wirsing explored why wolves and other top predators （捕食者）were needed for diverse ecosystems to develop. Using a simple video camera, Wirsing is gaining a unique view point on predatorprey relationships and changing the way we think about wolves. Yellowstone has benefited from the reintroduction of wolves in ways that we did not anticipate, especially the plexity of biological interactions（互動） in the park, explained Mark Boyce, a professor in the Department of Biological Sciences. We were really surprised at that and we39。故B選項讓現代科技溫暖你的冬日符合題意?，F如今，每到嚴冬時節(jié)，雖然溫度驟降、天氣惡劣，但隨著各類智能保暖產品的問世，冬天也能變得舒適宜人。所以C選項科技無法讓冬天變得不那么難熬不符合短文說明的內容。 （3）考查細節(jié)理解。 （2）考查細節(jié)理解。你外出時必須穿得暖和一點。人們憑借科學技術發(fā)明了各式各樣的防寒方法。A Modern winterC.Bluetooth technology is used in the clothing for the head（4）What39。Tado39。The equipment placed inside the clothing produces heat.B.B.Fix an air conditioner. For many, the thought of winter used to be enough to make their blood run cold. But using technology, life needn39。 With a smart thermostat (溫度自動調節(jié)器), our homes can be warm when we need them to be. Many models feature smartphone apps that allow you to control temperature remotely, so we can warm up the house before we arrive home. According to , Tado39。t have to be so challenging any more. Technology, engine ring and design have advanced giving us new solutions to old problems. It means dealing with winter needn39。t get cold to the bone.故選A。 （3）考查細節(jié)理解。 （2）考查推理判斷。 （1）考查細節(jié)理解。B.D.increase tobacco plants39。To serve the science experiment smoothly.（3）In the future, the genetic changes will be used to. A.To warn people of the hot and bright sun.B.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。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. 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. s genes, the scientists were able to increase the amount of leaf growth on plants between 14 and 20 percent. s genes in order to make it use sunlight more quickly. Someday, the results could increase the amount of food produced around the world. ”可知，作者接下來可能會告訴我們“如何全面擴大5G覆蓋。t get too excited. There39?！?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。根據第二段中的“and that is to say, it is a sign of tim”也就是說，這是時間的標志，”可知，劃線詞的意思是“標志，象征”。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。t concentrated in big cities.D.Tech panies will face the fact that smartphones may be replaced（4）What will the author probably tell us next? A.5G world won39。B.Exhibition.The lightingfast speed of 5G.B. But don39。 Ericsson stated at February39。 Augmented reality glasses and virtual headset haven39。s pulling in data from other vehicles about road conditions down the lane. It could be weather information, but also connected infrastructure (基礎設施) construction. There39。re moving closer and closer to 5G world. From smarthome security to selfdriving cars, all the internetconnected devices in your life will be able to talk to each other at lightningfast speeds with reduced delay, Objectively speaking, the fastest 4G download speeds in the U. S. top out at an average of Mbps. But by parison 5G promises gigabit (千兆) speeds.本文主要介紹了森林治愈和大自然對于人類健康尤其是大腦工作效率和減緩壓力方面的益處，故B項作標題最符合文章的主旨。 （3）考查細節(jié)理解。故選A。s feelings. lowers the risks of diseases. helps improve mental performance. does more good than physical exercise.（4）What would be the best title for the text? life in forests brain on nature future of forest healing benefits of a stressfree life【答案】 （1）A（2）A（3）C（4）B 【解析】【分析】本文是一篇說明文，由韓國患創(chuàng)傷后應激障礙的消防員接受森林治愈談起，介紹了大自然對我們身心健康的益處。 So what are some of the benefits of nature that Nisbet refers to? Being surrounded by nature has one obvious effect: It calms us and reduces our stress levels. This has been shown to lower blood pressure and heart rates. We don39。 the firefighters all have posttraumatic stress disorder (創(chuàng)傷后應激障礙). Another experiment conducted by psychologist Stephen Kaplan found that people who took a 50minute walk in a park had better attention and shortterm memory than those who took a walk along a city street.s more surprising is that nature may also make us more creative. David Strayer, a psychologist at the University of Utah, showed as much with a group of participants, who performed 50 percent better on creative problemsolving tasks after three days of wilderness backpacking.s as it should be.（1）What is Kang Byoungwook doing? lost in nature. up his strength. to control a forest fire. firefighters under stress.（2）What does Lisa Nisbet think of being outdoors? is overlooked by people. has nothing to do with happiness. Koreans show great interest in it. need more evidence for its benefits.（3）What benefit of nature d