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1、专题06 阅读理解（环保类）【母题来源一】【2019北京卷，D】环保类By the end of the century，if not sooner，the worlds oceans will be bluer and greener thanks to a warming climate，according to a new study.At the heart of the phenomenon lie tiny marine microorganisms(海洋微生物)called phytoplankton. Because of the way light reflects off
2、the organisms，these phytoplankton create colourful patterns at the ocean surface. Ocean colour varies from green to blue，depending on the type and concentration of phytoplankton. Climate change will fuel the growth of phytoplankton in some areas，while reducing it in other spots，leading to changes in
3、 the oceans appearance.Phytoplankton live at the ocean surface，where they pull carbon dioxide(二氧化碳)into the ocean while giving off oxygen. When these organisms die，they bury carbon in the deep ocean，an important process that helps to regulate the global climate. But phytoplankton are vulnerable to t
4、he oceans warming trend. Warming changes key characteristics of the ocean and can affect phytoplankton growth，since they need not only sunlight and carbon dioxide to grow，but also nutrients.Stephanie Dutkiewicz，a scientist in MITs Center for Global Change Science，built a climate model that projects
5、changes to the oceans throughout the century. In a world that warms up by 3，it found that multiple changes to the colour of the oceans would occur. The model projects that currently blue areas with little phytoplankton could become even bluer. But in some waters，such as those of the Arctic，a warming
6、 will make conditions riper for phytoplankton，and these areas will turn greener. “Not only are the quantities of phytoplankton in the ocean changing. ”she said，“but the type of phytoplankton is changing. ”42. What are the first two paragraphs mainly about?A. The various patterns at the ocean surface
7、.B. The cause of the changes in ocean colour.C. The way light reflects off marine organisms.D. The efforts to fuel the growth of phytoplankton.43. What does the underlined word “vulnerable” in Paragraph 3 probably mean?A. Sensitive.B. BeneficialC. SignificantD. Unnoticeable44. What can we learn from
8、 the passage?A. Phytoplankton play a declining role in the marine ecosystem.B. Dutkiewiczs model aims to project phytoplankton changesC. Phytoplankton have been used to control global climateD. Oceans with more phytoplankton may appear greener.45. What is the main purpose of the passage？A. To assess
9、 the consequences of ocean colour changesB. To analyse the composition of the ocean food chainC. To explain the effects of climate change on oceansD. To introduce a new method to study phytoplankton【语篇解读】本文为说明文。一项最新研究表明，由于气候变暖，世界海洋将会变得更蓝、更绿。这一现象是因为一种叫做浮游植物的微小海洋微生物，因为光线反射的作用，它们在海洋表面形成了五颜六色的图案。但是浮游植物很
10、容易受到海洋变暖趋势的影响。气候变暖会改变海洋的主要特征，并影响浮游植物的生长。42. B 【解析】段落大意题。第一段“By the end of the century. If not sooner, the worlds oceans will be bluer and greener thanks to a warming climate, according to a new study.”可知，到本世纪末，一项新的研究表明，由于气候变暖，如果不尽快的话，世界上的海洋将会变得更蓝、更绿。结合第二段“At the heart phenomenon lie tiny marine micr
11、oorganisms called phytoplankton. Becaust of the way light reflects off the organisms ,these phytoplanktons create colourful patterns at the ocean surface. Ocean colour varies from green to blue, depending on the type and concentration”可知，这种现象的核心是一种叫做浮游植物的微小海洋微生物，在光线的作用下在海洋表面形成了五颜六色的图案。海洋的颜色从绿色到蓝色不等，
12、这取决于海洋的类型和浮游植物浓度。由此可推断出这两段主要叙述了海洋生物是海洋颜色变化的原因。分析选项可知B符合题意，故选B。43. A【解析】词义猜测题。根据划线词后的“Warming changes key characteristics of the ocean and can affect phytoplankton growth, since they need not only sunshine and carbon dioxide to grow, but also nutrients.”可知，气候变暖会改变海洋的主要特征，并会影响浮游植物的生长。由此可判断“But phytopl
13、ankton are vulnerable to the oceans wamning trend”可知，浮游植物很容易受到海洋变暖趋势的影响。可知A项正确。44. D 【解析】推理判断题。根据第四段“The model projects that currently blue areas with little phytoplankton could become even bluer. But in some waters ,such as those of the Arctic, a warming will make conditions riper for phytoplankton
14、, and these areas will turn greener”,可知Dutkiewicz的模型预测，目前只有少量浮游植物的蓝色区域可能会变得更蓝。但是在一些水域，比如北极，气候变暖会使浮游植物的生长条件更加成熟，而这些水域会变得更绿了”。由此可推断，浮游植物的生长条件更加成熟，浮游动植物就更多了，这些水域会变得更绿了。分析选项可知D项符合题意。45. C【解析】目的意图题。第一段提出文章的主旨“By the end of the century. If not sooner, the worlds oceans will be bluer and greener thanks to
15、a warming climate, according to a new study.”可知到本世纪末。一项新的研究表明，由于气候变暖，如果不尽快的话，世界上的海洋将会变得更蓝、更绿。再结合第三段“But phytoplankton are vulnerable to the oceans warning trendWarming changes key characteristics of the ocean and can affect phytoplankton growth, ”可知，“浮游植物很容易受到海洋警告趋势的影响，变暖改变了海洋的关键特征，并能影响浮游植物的生长”。可知本文
16、主要解释气候变化对海洋的影响。故选C。【母题来源二】 【2019天津卷，C】环保类How does an ecosystem（生态系统）work？What makes the populations of different species the way they are？Why are there so many flies and so few wolves？To find an answer，scientists have built mathematical models of food webs，noting who eats whom and how much each one
17、eats.With such models，scientists have found out some key principles operating in food webs. Most food webs，for instance，consist of many weak links rather than a few strong ones. When a predator（掠食动物）always eats huge numbers of a single prey（猎物），the two species are strongly linked；when a predator liv
18、es on various species，they are weakly linked. Food webs may be dominated by many weak links because that arrangement is more stable over the long term. If a predator can eat several species，it can survive the extinction（灭绝）of one of them. And if a predator can move on to another species that is easi
19、er to find when a prey species becomes rare，the switch allows the original prey to recover. The weak links may thus keep species from driving one another to extinction.Mathematical models have also revealed that food webs may be unstable，where small changes of top predators can lead to big effects t
20、hroughout entire ecosystems. In the 1960s，scientists proposed that predators at the top of a food web had a surprising amount of control over the size of populations of other species-including species they did not directly attack.And unplanned human activities have proved the idea of top-down contro
21、l by top predators to be true. In the ocean，we fished for top predators such as cod on an industrial scale，while on land，we killed off large predators such as wolves. These actions have greatly affected the ecological balance.Scientists have built an early-warning system based on mathematical models
22、. Ideally，the system would tell us when to adapt human activities that are pushing an ecosystem toward a breakdown or would even allow us to pull an ecosystem back from the borderline. Prevention is key，scientists says because once ecosystems pass their tipping point（临界点），it is remarkably difficult
23、for them to return.46. What have scientists discovered with the help of mathematical models of food webs？A. The living habits of species in food webs.B. The rules governing food webs of the ecosystems.C. The approaches to studying the species in the ecosystems.D. The differences between weak and str
24、ong links in food webs.47. A strong link is found between two species when a predator_A. has a wide food choiceB. can easily find new preyC. sticks to one prey speciesD. can quickly move to another place48. What will happen if the populations of top predators in a food web greatly decline？A. The pre
25、y species they directly attack will die out.B. The species they indirectly attack will turn into top predators.C. The living environment of other species will remain unchanged.D. The populations of other species will experience unexpected changes.49. What conclusion can be drawn from the examples in
26、 Paragraph 4？A. Uncontrolled human activities greatly upset ecosystems.B. Rapid economic development threatens animal habitats.C. Species of commercial value dominate other species.D. Industrial activities help keep food webs stable.50. How does an early-warning system help us maintain the ecologica
27、l balance？A. By getting illegal practices under control.B. By stopping us from killing large predators.C. By bringing the broken-down ecosystems back to normal.D. By signaling the urgent need for taking preventive action.【语篇解读】这是一篇说明文。本文介绍了借助食物网的数学模型，科学家们发现了一些在食物网运营的关键原则。科学家们说；因为一个生态系统越过了它的临界点，它们很难再
28、回来。该系统将告诉我们何时适应人类活动，这些活动正将生态系统推向崩溃，或者甚至允许我们将生态系统从边缘拉回来，预防是关键。46.B 【解析】细节理解题。根据第一段的With such models, scientists have found out some key principles operating in food webs.可知，借助食物网的数学模型，科学家们发现了食物网中的一些关键原则。故选B。47. C【解析】细节理解题。根据第一段的When a predator(掠食动物) always eats huge numbers of a single prey(猎物)，the t
29、wo species are strongly linked可知，当捕食者总是吃大量的单一猎物，这两个物种是紧密相连的。故选C。48. D 【解析】推理判断题。根据第二段的In the 1960s, scientists proposed that predators at the top of a food web had, a surprising amount of control over the size of populations of other species they did not directly attack可知，处于食物网顶端的食肉动物对它们没有直接攻击的其他物种的
30、种群数量有着惊人的控制，由此可推断出，如果食物链顶级食肉动物的数量大大下降，其他物种的种群将经历意想不到的变化。故选D。49.A 【解析】推理判断题。根据第四段的Ideally the system would tell us when to adapt human activities that are pushing an ecosystem toward a breakdown or would even allow us to pull an ecosystem back from the borderline可知，人类过度的活动会将生态系统推向崩溃，由此可推断出，不受控制的人类活动极
31、大地破坏了生态系统。故选A。50. D 【解析】细节理解题。根据最后一段的Scientists have built an early-warning system based on mathematical models. Ideally the system would tell us when to adapt human activities that are pushing an ecosystem toward a breakdown or would even allow us to pull an ecosystem back from the borderline.可知，早期
32、变暖系统发出紧急需要采取预防行动的信号帮助我们维持生态平衡。故选D。 【母题来源三】 【2019浙江卷，C】、California has lost half its big trees since the 1930s, according to a study to be published Tuesday and climate change seems to be a major factor(因素).The number of trees larger than two feet across has declined by 50 percent on more than 46, 00
33、0 square miles of California forests, the new study finds. No area was spared or unaffected, from the foggy northern coast to the Sierra Nevada Mountains to the San Gabriels above Los Angeles. In the Sierra high country, the number of big trees has fallen by more than 55 percent; in parts of souther
34、n California the decline was nearly 75 percent.Many factors contributed to the decline, said Patrick Mclntyre, an ecologist who was the lead author of the study. Woodcutters targeted big trees. Housing development pushed into the woods. Aggressive wildfire control has left California forests crowded
35、 with small trees that compete with big trees for resources(资源).But in comparing a study of California forests done in the 1920s and 1930s with another one between 2001 and 2010, Mclntyre and his colleagues documented a widespread death of big trees that was evident even in wildlands protected from
36、woodcutting or development.The loss of big trees was greatest in areas where trees had suffered the greatest water shortage. The researchers figured out water stress with a computer model that calculated how much water trees were getting in comparison with how much they needed, taking into account s
37、uch things as rainfall, air temperature, dampness of soil, and the timing of snowmelt(融雪).Since the 1930s, Mclntyre said, the biggest factors driving up water stress in the state have been rising temperatures, which cause trees to lose more water to the air, and earlier snowmelt, which reduces the w
38、ater supply available to trees during the dry season.27. What is the second paragraph mainly about?A. The seriousness of big-tree loss in California.B. The increasing variety of California big trees.C. The distribution of big trees in California forests.D. The influence of farming on big trees in Ca
39、lifornia.28. Which of the following is well-intentioned but may be bad for big trees?A. Ecological studies of forests.B. Banning woodcutting.C. Limiting housing development.D. Fire control measures.29. What is a major cause of the water shortage according to Mclntyre?A. Inadequate snowmelt.B. A long
40、er dry season.C. A warmer climate.D. Dampness of the air.30. What can be a suitable title for the text?A. Californias Forests: Where Have All the Big Trees Gone?B. Cutting of Big Trees to Be Prohibited in California SoonC. Why Are the Big Trees Important to California Forests?D. Patrick Mclntyre: Gr
41、ow More Big Trees in California【语篇解读】本文为说明文，根据一项研究表明，自20世纪30年代以来，加州已经失去了一半的大树，气候变化似乎是其主要因素。27.A 主旨大意题。在第二段中，作者用具体数据说明了大树损失在各个地区的严重程度，没有任何地区幸免或不受影响，故选A。28. D【解析】推理判断题。根据第三段最后一句Aggressive wildfire control has left California forests crowded with small trees that compete with big trees for resources（资源
42、）.可知，野火控制在控制了森林大火的同时，使得加利福尼亚的森林里挤满了小树，它们与大树争夺资源，这对大树产生了不利的影响，故选D。29.C 【解析】细节理解题。根据最后一段the biggest factors driving up water stress in the state have been rising temperatures, , and earlier snowmelt, 可知，造成加州水资源短缺的最大因素是气温的上升，以及较早的融雪，故选C。30.A 【解析】主旨大意题。通读全文可知，自20世纪30年代以来，加州已经失去了一半的大树，文章分析了引起该现象的几个主要因素。全
43、文围绕“加州森林的大树都去哪儿了”话题展开，故选项A符合题意。 【命题意图】 阅读理解从能力的角度来讲，考查学生运用英语的能力，具体地说，就是通过阅读有关文章提取有用信息的能力。【考试方向】 人与自然和谐发展”是时代的主题，生态环保的话题也越来越多地出现在新试题中。在命题方面有以下趋势：|1.题材：强调人与自然和谐发展。2.选材：关注人、自然的生存现状和未来发展。3.命题：形式多样，突出整体理解，合理推断。【得分要点】 1.应试生态环保类题目时，在理解文章的基础上，要重点突破归纳主旨大意技能，因为推断是以整体理解为基础的推断能力。那么，怎样归纳主旨大意？（1）寻找具体段落的中心思想的方法是：找
44、出每小段的主题句。主题句通常有这样的特点：有一个话题（topic）；有阐述控制性概念（controlling idea）偶尔也可在一段中间；有的文章无明显主题句，主题句隐含在段意之中。这就需要读者进一步加工概括了。（2）寻找整篇文章的中心思想的方法建立在寻找具体段落中心的基础上的。应观察全文的结构安排，理解文章浓墨重笔写的“重心”，考虑文章组织材料及支撑性细节是服务于什么的，分析故事的发展结局都是围绕什么中心大意来安排的。（3）典型错误：忽视文章的结构；混淆了中心与支撑细节或材料的区别；忽视文章表意的倾向性；漏掉了主要的特征词。2.怎样正确推理判断推理判断试题要求考生尽量考虑文中全部信息或事实
45、，在通篇理解文章的基础上领会作者的言外之意，并作出正确的推理和判断。（1）数据推断题解答此类题，关键是要善于捕捉有关数字的信息，然后在透彻理解原文的字面意义和题意的基础上，运用自己的数学知识，对其进行分析、推算，从而得出正确的结论。（2）知识推断题根据文章中所阐述的细节，运用基础知识进行分析、推敲，从而得出符合文章原义的结论的一种推断方法。（3）逻辑结论推断题根据事实、论点、例证等一系列论据材料，不是根据自己的经验、态度、观点或爱好去理解文章的内涵。解答这类题的前提是要首先获得短文的主题思想或列举的具体事实，然后按题意要求进行推断。（4）对作者态度、倾向的推断题作者的倾向和感情往往隐含在文章的
46、字里行间，或流露于修饰的词语之中，因此，在推断过星中，应特别注意文中作者的措辞。【母题1】【湖南省长沙市雅礼中学2019届高三下学期模拟】A team of international scientists is due to set off for the worlds biggest iceberg in a mission aiming to answer fundamental questions about the impact of climate change in the polar regions. The scientists, led by he British Anta
47、rctic Survey( BAS), are trying to reach a newly revealed ecosystem that had been hidden for 120,000 years below the Larsen C ice shelf.Last year, part of the Larsen C ice shelf calved (崩解) away, forming a huge iceberg-A68-which is four times bigger than London, and revealing life beneath for the fir
48、st time. Now scientists say it is a race against time to explore these new ecosystems before they are transformed to the light. Marine biologist Dr Katrin Linse from the BAS is leading the mission.“The calving of A68 provides us with a unique opportunity to study marine life as it responds to a huge environment change,” she said. “It is important that we get there quickly before the undersea environment changes as sunlight enters the water.”Professor David Vaughan, science director at the BAs, said, “We need to be bold (大胆的) on this one. Larsen C is a