【正文】 these top predators is important not just for wolves as a species, but for hundreds of species at every level of an ecosystem.”可知，這項研究再次證明了為什么保護這些食肉動物不僅對狼這個物種很重要，而且對生態(tài)系統(tǒng)的各個層面的物種都很重要。The introduction of wolves in Yellowstone National Park is a success.【答案】 （1）A（2）D（3）B（4）A 【解析】【分析】本文是一篇說明文，研究表明人類以及其他動物對狼的恐懼對維持健康、平衡的生態(tài)系統(tǒng)是有益的，其中黃石公園灰狼的引進就是一個典型的例子。To study what good wolves can do to ecosystems.（3）What is the significance of the research? A.Notice.Expect.由此可知。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(nóng)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。根據(jù)第二段中的 What we found is that impacts vary across nations, but in the high173。free land used.B.Not all the countries have remended diets in an explicit manner.D.for173。ine countries, Behren39。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.t mention explicitly—or most of them don39。故選A。s foot ...around a centimetre shorter than the Belgic foot”和“Greek, Egyptian and Babylonian versions of water in a fixed container varied from one another by a few kilos,以及The lieue (former measure of distance), for example, varied from just over 3 km in the north to nearly 6 km in the south”可推知，本段作者主要運用了對比的寫作方法，把同一計量單位在不同國家之間或者在同一國家不同區(qū)域間的差異進行了說明。 At a meeting in Versailles, France, on November 16th, 2018, the world39。 （3）考查細節(jié)理解。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。 We don39。 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.他完全沉浸在大自然之中。 （4）考查主旨大意。 Throughout much of human history, man has been the measure of many, if not all, things. Lengths were divided up into feet and smaller units from the human hand. Other measures were equally characteristic. Mediterranean traders for centuries used the weight of grains of wheat to define (定義) their units of mass. The Romans used libra, forerunner of the pound, by referring to the weight of a carob (角豆樹) seed.me International d39。 （1）考查推理判斷。根據(jù)第三段中的“it was the French who in 1799 made it law和The Syst232。s measurement bodies are almost certain to approve a decision that will mean four out of the seven base SI units...will follow the other three...in being redefined in terms of the values of physical constants”可知，在法國凡爾賽宮召開的會議上，七個基本計量單位中的四個將被重新定義，其中包括對千克的重新定義。s good for the planet, too.ine nations. said Paul Behrens, an environmental scientist at Leiden University in the Netherlands. However, following dietary guidelines would reduce those impacts, especially in wealthy countries like the US. Most of the reductions e from meat and dairy, which have an outsized impact on land use and pollution, and are a major source of greenhouse gases.(That39。t mention the diet explicitly for its impacts can be ignored.（2）What do the underlined words takes a big toll on new program concerning healthy eating for schools is likely to be based on national nutrition guidelines.D.t explicitly mention—environmental impacts, that you are going to have lower environmental impacts due to that.” 我們發(fā)現(xiàn)（營養(yǎng)膳食指南的）影響因國家而異，但總的來說，在影響力較大的國家，如果你遵循國家推薦的膳食指南，即使這些膳食并未明晰對環(huán)境的影響，或者大多數(shù)膳食沒有明確說明這一點，但是你對環(huán)境的影響會因為遵循指南而減輕。takes a big toll on固定短語，“付出了巨大的代價”，故選B。4．犇犇閱讀理解 B.D.It shows the plex relationships between species.D.故選A。 （4）考查主旨大意。 impressive feat is a useful example to show how artificial intelligence works—real AI. Both of Richard and AI take in massive amounts of data to achieve goals with unlimited memory and superman accuracy in a certain field.To mention Nigel39。Be similar toThe shop assistant.因此,在人工智能時代人類仍然會有工作,關鍵必須是對勞動力進行再培訓,這樣人們才能從事這些工作。 （2）考查詞義猜測。排除A；再根據(jù)第四段中的“as the fourth type is much larger: jobs where emotions are needed, such as teachers, nannies and doctors.”可知需要情感的工作,例如老師,保姆和醫(yī)生也不大可能被取代,因此排除C和D。 Air pollution in Indians capital surged to its worst levels in years, covering the city in a thick smog that has bee an annual publichealth emergency despite government vows to solve the problem.由此可判斷出政府幾乎沒有保護其公民免受嚴重污染。根據(jù)第五段中的“New Delhi, is engulfed each year as the weather cools and a thick haze builds up from the pollutants emitted from cars and coalbased power plants, swirling dust from construction sites and roads and smoke from crop stubble burning in neighboring states.”本句是說新德里每年都籠罩在污染中。故選B。 The history of eSports dates back to 1972 when some Stanford University students peted in the Intergalactic Space War Olympics for the opportunity to win a oneyear subscription to the Rolling Stone Magazine. ESports pretty much continued on the rather quiet path until the 80s when petitions like the Space Invaders Championship shot them to the spotlight. 2002 marked the beginning of a new era for the sport and laid the foundation for what eSports would bee thanks to the release of the Xbox live, which brought online play to consoles. Halo Ⅱ became the first game to be shown on national television for Major League Gaming in 2004, paving the way for eSports to bee a global phenomenon.They are strongly petitive.B.B.Doubtful.根據(jù)第一段中的ESports are professional multiplayer video game petitions. Any video game with a strong petitive element is considered eSports.可知,電子競技是一種專業(yè)的多人視頻游戲競賽,任何具有強烈競爭元素的電子游戲都被認為是電子競技,也就是說電子競技具有很強的競爭性,故選