2019届高考英语(江苏专版)二轮复习与策略讲练：第1部分 专题3 类型6 生态环保

类型6| 生态环保考查要点方法技巧1.生态环保的现状，造成的影响。

2．生态环境被破坏的因素，产生的后果。

3．保护生态环境的措施、步骤。

1.理清文章的行文结构，把握主旨大意。

2．抓住造成生态环境变迁的原因这一主线。

3．领会作者所透露出的观点态度。

(2016·北京高考·C )California Condor's Shocking RecoveryCalifornia condorCalifornia condors are North America's largest birds ，with wing －length of up to 3 meters.In the 1980s ，electrical lines and lead poisoning(铅中毒) nearly drove them to dying out.Now ，electric shock training and medical treatment are helping to rescue these big birds.In the late 1980s ，the last few condors were taken from the wild to be bred(繁殖)．Since 1992，there have been multiple reintroductions to the wild ，and there are now more than 150 flying over California and nearby Arizona ，Utah and Baja in Mexico.Electrical lines have been killing them off.“As they go in to rest for the night ，they just don't see the power lines ，” says Bruce Rideout of San Diego Zoo.Their wings can bridge the gap between lines ，resulting in electrocution (电死) if they touch two lines at once.So scientists have come up with a shocking idea.Tall poles ，placed in large training areas ，teach the birds to stay clear of electrical lines by giving them a painful but undeadly electric shock.Before the training was introduced ，66% of set －freebirds died of electrocution.This has now dropped to 18%.Lead poisoning has proved more difficult to deal with.When condors eat dead bodies of other animals containing lead，they absorb large quantities of lead.This affects their nervous systems and ability to produce baby birds，and can lead to kidney(肾) failure and death.So condors with high levels of lead are sent to Los Angeles Zoo，where they are treated with calcium EDTA，a chemical that removes lead from the blood over several days.This work is starting to pay off.The annual death rate for adult condors has dropped from 38% in 2000 to 5.4% in 2011.Rideout's team thinks that the California condors' average survival time in the wild is now just under eight years.“Although these measures are not effective forever，they are vital for now，” he says.“They are truly good birds that are worth every effort we put into recovering them.”63．California condors attract researchers' interest because they ________．A．are active at nightB．had to be bred in the wildC．are found only in CaliforniaD．almost died out in the 1980s64．Researchers have found electrical lines are ________．A．blocking condors' journey homeB．big killers of California condorsC．rest places for condors at nightD．used to keep condors away65．According to Paragraph 5，lead poisoning ________．A．makes condors too nervous to flyB．has little effect on condors' kidneysC．can hardly be gotten rid of from condors' bloodD．makes it difficult for condors to produce baby birds66．This passage shows that ________．A．the average survival time of condors is satisfactoryB．Rideout's research interest lies in electric engineeringC．the efforts to protect condors have brought good resultsD．researchers have found the final answers to the problem语篇解读：本文是一篇说明文。

美国加利福尼亚秃鹰由于触电和铅中毒而濒临灭绝，研究人员采取了一些措施来挽救秃鹰，从而使这一种群渐渐恢复了生机。

长难句解读：So condors with high levels of lead are sent to Los Angeles Zoo，where they are treated with calcium EDTA，a chemical that removes lead from the blood over several days.分析：本句为复合句。

主语部分有with短语作定语，where引导的定语从句修饰前面的Los Angeles Zoo，a chemical为calcium EDTA的同位语，其后是that引导的定语从句。

翻译：于是，体内含有高剂量铅的秃鹰被送往洛杉矶动物园。

在那里，用一种名为EDTA的钙物质为其治疗，这是一种化学药物，能够在几天时间内清除血液中的铅。

63．D　[推理判断题。

根据第一、二段内容可知，20世纪80年代，由于触电和铅中毒，加利福尼亚州的秃鹰濒临灭绝，20世纪80年代末，仅剩的几只秃鹰从野外被带回繁殖，由此可推断正是秃鹰濒临灭绝才引起了研究人员的注意和兴趣，故选D项。

]64．B　[细节理解题。

根据第三段内容可知，电线一直是使秃鹰丧命的杀手，并且解释原因说，秃鹰晚上休息的时候看不见电线，而它们宽大的翅膀正好同时搭在两根电线上，于是它们立刻就被电死了，故选B项。

] 65．D　[细节理解题。

根据第五段内容可知，铅中毒影响了秃鹰的神经系统和繁殖能力(affects their nervous systems and ability to produce baby birds)，并且可以导致它们肾衰竭和死亡，故选D项。

]66．C　[推理判断题。

本文主要介绍了美国加利福尼亚秃鹰濒临灭绝以及科研人员为挽救它们而展开的救援和研究工作，且实施的措施有了回报(pay off)，故选C项。

]A(2016·盐城三模)For 150 million years during the age of the dinosaurs，a group of dolphin－like reptiles called ichthyosaurs ruled the ocean－until everything started to go wrong.After multiplying into about 100 known species，ichthyosaurs began to disappear from the oceans around the middle of the Cretaceous period，a time of turbulent(混乱的)changes in the environment.The aquatic(水产的)reptiles went extinct 28 million years before the rest of their dinosaur cohort.Scientists have been unable to find a singular cataclysmic event，such as a volcanic eruption or meteorite strike，that could explain ichthyosaurs' abrupt disappearance from the fossil record.Now researchers have new explanation for the lizard fish's demise: They had lost their ability to adapt to a swiftly changing climate.The aquatic lizards thrived throughout the early years of the dinosaurs in the Permian，Triassic and Jurassic periods.Then came the Cretaceous.That was a turbulent time to live on Earth.The poles were nearly ice－free，causing sea levels to reach great heights.Temperatures were among the hottest the planet has seen in the last 250 million years.Scientists have blamed the demise of the ichthyosaurs on their inability to keep up with other predators or the loss of key prey species.But a new study by Valentin Fischer，a paleontologist who studies ichthyosaurs at the University of Liege in Belgium，and his colleagues says neither of these explanations could account for the scale and speed of the die－off.Writing in the journal Nature Communications，Fischer and his colleaguesargue that the unstable climate contributed to the disappearance of ichthyosaurs during a 5－million to 6－million－year window in the Cretaceous known as the Cenomanian stage.While the rising temperatures and higher seas wouldn't have had a direct effect on the ichthyosaurs，they could have played an indirect role in their decline，Fischer said.The changing climate could have made their food more scarce，or disrupted migratory routes and birthing places，among other consequences.Despite their variety of body shapes and survival strategies，ichthyosaurs were unable to keep up with all of these changes，the study authors wrote.They reached this conclusion by comparing the geological record of the Cretaceous to a newly reconstructed history of ichthyosaur evolution based on museum specimens(样品)and a review of information in previously published studies.What became clear was the ichthyosaurs' extinction coincided with global climate shifts and the animals' slower rate of evolution, which left them unable to adapt as their environment changed，the study found.“They were probably very well adapted to their niches，and their environments were probably pretty stable，” Fischer said. “That could have lowered the pressure of natural selection and thus lowered their rates of evolution.”Think of the Cenomanian stage as a transition period.鱼龙是与恐龙同时代的物种。