高三英语阅读理解(科普环保)解题技巧及练习题(含答案)

高三英语阅读理解(科普环保)解题技巧及练习题(含答案)
一、高中英语阅读理解科普环保类
1．犇犇阅读理解
Slowly but surely we're moving closer and closer to 5G world. From smart-home security to self-driving cars, all the internet-connected devices in your life will be able to talk to each other at lightning-fast speeds with reduced delay, Objectively speaking, the fastest 4G download speeds in the U. S. top out at an average of 19.42 Mbps. But by comparison 5G promises gigabit (千兆) speeds.
“5G is one of those signs, along with artificial intelligence, of this coming data age,” said Steve Koenig, senior director of market research for the Consumer Technology Association. “The self-driving vehicle is a great emblem of this data age, and that is to say, it is a sign of time, because with one single task, driving, you have massive amounts of data coming from the vehicle itself, and a variety of sensors are collecting a lot of information to model its environment as it moves. It's pulling in data from other vehicles about road conditions down the lane. It could be weather information, but also connected infrastructure (基础设施) construction. There's lots of data behind that task, which is why we need high speed.
Augmented reality glasses and virtual headset haven't yet broken the mainstream, but tech companies are joyfully betting that these devices will eventually replace our smartphones. With 5G, that could actually happen. This is notable because companies such as Apple are reportedly developing AR glasses to assist — or perhaps even replace — smartphones.
Ericsson stated at February's Mobile World Congress how smart glasses could become faster and lighter with a 5G connection, because instead of being weighed down with components, the glasses could rely on hardware for processing power.
But don't get too excited. There's still a lot of work to be done in the meantime, including various trials to make sure the radios play nicely with hardware and infrastructure construction so 5G isn't concentrated only in big cities.
（1）What does the author want to stress in Paragraph 1?
A. The lighting-fast speed of 5G.
B. The expectation of 5G world.
C. The difference between 4G and 5G.
D. The internet-connected devices in our life.
（2）What does the underlined word "emblem" in Paragraph 2 mean?
A. Exhibition.
B. Success.
C. Symbol.
D. Explanation.
（3）We can infer from the text that ________.
A. 5G world won't come without AR glasses
B. 5G helps to create the artificial intelligence vehicle
C. Apple company is developing AR glasses worldwide
D. Tech companies will face the fact that smartphones may be replaced
（4）What will the author probably tell us next?
A. How to fully expand 5G coverage.
B. Smart glasses will become faster and lighter.
C. Why 5G isn't concentrated in big cities.
D. The importance of infrastructure construction.
【答案】（1）A
（2）C
（3）D
（4）A
【解析】【分析】本文是一篇说明文，介绍了我们离5G世界越来越近了。

（1）考查段落大意。

根据第一段中的“Slowly but surely, we're moving c loser and closer to 5G world.”缓慢但肯定的是，我们离5G世界越来越近了。

可知，作者在第一段想强调“5G光速快。

”故选A。

（2）考查词义猜测。

根据第二段中的“and that is to say, it is a sign of tim”也就是说，这是时间的标志，”可知，划线词的意思是“标志，象征”。

故选C。

（3）考查推理判断。

根据第三段中的“This is notable because companies such as Apple are reportedly developing AR glasses to assist — or perhaps even replace —smartphones.”这一点值得注意，因为据报道，苹果(Apple)等公司正在开发增强现实眼镜，以帮助——甚至取代——智能手机。

” 可知，我们可以从文中推断，科技公司将面临智能手机可能被取代的事实。

故选D。

（4）考查推理判断。

根据最后一段中的“But don't get too excited. There's still a lot of work to be done in the meantime, including various trials to make sure the radios play nicely with hardware and infrastructure construction so 5G isn't concentrated only in big cities.”但是不要太激动。

与此同时，仍有很多工作要做，包括各种试验，以确保收音机能很好地配合硬件和基础设施建设，这样5G就不会只集中在大城市。

”可知，作者接下来可能会告诉我们“如何全面扩大5G覆盖。

”故选A。

【点评】本题考点涉及段落大意，词义猜测和推理判断三个题型的考查，是一篇科普类阅读，要求考生根据上下文的逻辑关系，进行分析，推理，概括和归纳，从而选出正确答案。

2．犇犇Choose the one that fits best according to the information given in the passage you have read.
Stocky, slow-moving whale, rarely grows beyond 15 metres in length
Flippers are a third of body length; variable dorsal fin size and shape; saw-toothed trailing edge on flukes, often raised when diving
Bumpy tubercles on top of head
Body colour is dark brown to black; often extensive white on flippers and underside of body and flukes; such patterns enable individual recognition
Bushy blow, occasionally V-shaped
270-400 olive baleen plates
Humpback whales belong to the rorqual (groove-throated) family, which includes fin, sei, Bryde's, minke and blue whales. The big family migrate between winter tropical breeding areas (North West Shelf, Great Barrier Reef, New Caledonia, Vanuatu, Fiii, Tonga) and summer Antarctic feeding areas. Once common in New Zealand waters, humpbacks are now rarely seen and may migrate further offshore. Males compete for mates either by physical fight or by song. Females give birth to their young every two to three years; some non-breeding females probably remain in the southern waters during winter. Young humpback whales return to their area of birth but in later life some wander between breeding areas. Humpbacks eat small shrimps and other schooling prey, such as fish, forming small, cooperative groups of two to three individuals to feed. Similar species: Easily identifiable due to a 'hump' back when submerging, but at a distance may be confused with other species that raise their flukes when diving, such as sperm, right and blue whales.
Protection status: Recovering well from past whaling and now numerous in some former migration and aggregation areas, rarely seen in others.
（1）Which of the following is TRUE about humpback whales?
A. Their long flippers vary in length, size and shape like dorsal fin.
B. They are large and likely to grow longer than 15 metres.
C. The different colors and patterns of the body help to be recognized.
D. Their bumpy tubercles and blowholes are on both sides of head.
（2）Which of the following can be inferred from this article's description of humpback whales' migration?
A. They need warmer waters to breed.
B. They can't survive in extreme cold.
C. They find plentiful food in tropical waters.
D. They are mostly hunted in New Zealand waters.
（3）This article is mainly intended to .
A. explain why humpbacks are still hunted in some parts of the world
B. introduce how humpbacks migrate through some dangerous waters
C. popularize the basic knowledge of humpbacks and call for protection
D. help distinguish humpbacks from other similar species
【答案】（1）C
（2）A
（3）C
【解析】【分析】本文是一篇说明文，介绍了座头鲸外形特点、体重、颜色，以及其如何繁殖、喂养等生活习性等，并呼吁大家保护它。

（1）考查推理判断。

根据第四个小点后的一段"Body color is dark brown to black; often extensive white on flippers and underside of body and flukes; such patterns enable individual recognition"可知，座头鲸体色由深棕色至黑色，脚蹼、身体底部和尾鳍上通常是大面积的白色；这样的图案使单个的座头鲸很容易被识别。

分析选项可知C项符合题意，故选C。

（2）考查推理判断。

根据第五个小黑点后面的"The big family migrate between winter tropical breeding areas (North West Shelf, Great Barrier Reef, New Caledonia, Vanuatu, Fiii, Tonga) and summer Antarctic feeding areas." 座头鲸这个大家族在冬季的热带繁殖区（西北大陆架、大堡礁、新喀里多尼亚、瓦努阿图、斐济、汤加）和夏季南极喂养区之间迁徙。

可知，座头鲸在热带地区繁殖。

冬季的热带繁殖区，是温暖的地方。

可知座头鲸需要在暖和的地方繁殖，故选A。

（3）考查主旨大意。

本文主要对座头鲸外形特点、体重、颜色，以及其如何繁殖喂养等生活习性等作了介绍，并呼吁大家保护意识。

所以本文目的是普及有关座头鲸的知识，并对它们加以保护。

分析选项可知C项符合题意，故选C。

【点评】本题考点涉及推理判断和主旨大意三个题型的考查，是一篇科普类阅读，要求考生根据上下文的逻辑关系，进行分析，推理，概括和归纳，从而选出正确答案。

3．犇犇Choose the one that fits best according to the information given in the passage you have just read.
Being able to land safely is a critically important skill for all flying animals. Comparatively speaking, ground living animals face no particular challenge when they need to stop running or crawling, while flying animals move at much higher speed, and they must be careful about how they land. Hitting the ground, or even water, at full flight speed would be quite dangerous. Before touching down, they must decrease their speed in order to land safely. Both bats and birds have mastered the skill of landing, but these two types of flyers go about it quite differently.
In the past it was believed that, in terms of flying mechanics, there was little difference between bats and birds. This belief was based only on assumption, however, because for years nobody had actually studied in detail how bats move their wings. In recent years, though,
researchers have discovered a number of interesting facts about bat flight. Bats are built differently from birds, and their wings are made up of both their front and hind limbs (肢体). This makes coordinating (协调) their limbs more difficult for bats and, as a result, they are not very good at flying over longer distances. However, they are much better at the ability to adjust themselves: a bat can quickly change its direction of flight or completely reverse it, something a bird cannot easily do.
Another interesting characteristic of bat flight is the way in which bats land-upside down! Unlike birds which touch down on the ground or on tree branches, bats can be observed flying around and then suddenly hanging upside down from an object overhead. One downside to this landing routine is that the bats often land with some force, which probably causes pain. However, not all bats hit their landing spots with the same speed and force; these will vary depending on the area where a bat species makes its home. For example, a cave bat, which regularly lives on a hard stone ceiling, is more careful about its landing preparation than a bat more accustomed to landing in leafy treetops.
（1）Which of the following is the topic of the passage?
A. Places where flying animals choose to land.
B. Why scientists have difficulty observing bats.
C. Differences in the eating habits of bats and birds.
D. Ways in which bats move differently from birds.
（2）Which of the following is a false assumption about bats that was recently corrected?
A. They cannot hear any sound.
B. They sleep upside down.
C. They fly similarly to birds.
D. They hide in tree branches.
（3）The word "it" (in 2nd paragraph) probably refers to "______".
A. the distance to the nets
B. the sense of flying height
C. the flying direction
D. the ability to change the speed
（4）According to the passage, which of the following is NOT true?
A. Bats might hurt themselves when landing.
B. Bats can hang upside down like birds.
C. Bats can adjust speed before landing.
D. Bats and birds land in different ways.
【答案】（1）D
（2）C
（3）C
（4）B
【解析】【分析】本文是一篇议论文，作者用研究事实来证明蝙蝠在飞行及运动方式与鸟类完全不同。

以前人们认为蝙蝠和鸟类在运动方面没有什么区别，但现在的研究证明蝙蝠的构造不同于鸟类，它们的翅膀由前肢和后肢组成，它们自我调节能力好，可迅速改变飞行方向，或完全逆行，这是鸟类不容易做到的，而且蝙蝠飞行的另一个有趣特征是蝙蝠倒立着降落的！这不同于那些降落在地上或树枝上的鸟。

（1）考查主旨大意。

根据第一段中的"Both bats and birds have mastered the skill of landing, but these two types of flyers go about it quite differently."提出了蝙蝠与鸟的降落方式及飞行的不同。

第二段用研究证明过去认为蝙蝠和鸟类在飞行运动方面没有什么区别是错误的。

尤
其是"they are much better at the ability to adjust themselves: a bat can quickly change its direction of flight or completely reverse it, something a bird cannot easily do"可知蝙蝠与鸟的运动不同；第三段中的"Another interesting characteristic of bat flight is the way in which bats land-upside down! Unlike birds which touch down on the gro und or on tree branches,…"再一次说明了蝙蝠与鸟运动方式的不同。

综上所述，可知，蝙蝠与鸟运动方式的不同是本文的主题。

故选D。

（2）考查推理判断。

根据第二段中的"In the past it was believed that, in terms of flying mechanics, there was little difference between bats and birds. This belief was based only on assumption, however, because for years nobody had actually studied in detail how bats move their wings…This makes coordinating (协调) their limbs more difficult for bats and, as a result, they are not very good at flying over longer distances."可推断出，过去人们认为蝙蝠与鸟在飞行运动方式与鸟没有区别，最近的研究发现，这是不正确的，故也是要纠正的，故选C。

（3）考查代词指代。

划线部分的上下文说"蝙蝠在自我调节的能力上要好得多：蝙蝠可以迅速改变飞行方向，或者完全与它（正飞行方向）相反的方向飞行，这是鸟不容易做到的。

"由此可知，此处的"it"指的是飞行的方向。

故选C。

（4）考查推断判断。

根据第三段中的"Another interesting characteristic of bat flight is the way in which bats land-upside down! Unlike birds which touch down on the ground or on tree branches, bats can be observed flying around and then suddenly hanging upside down from an object overhead. One downside to this landing routine is that the bats often land with some force, which probably causes pain."可知，蝙蝠飞行的另一个有趣特征是蝙蝠倒立着降落的方式！不同于那些降落在地上或树枝上的鸟，观察到蝙蝠可以四处飞行，然后突然倒挂在头顶的物体上。

这种降落方式的一个缺点是蝙蝠经常用力降落，这可能会导致疼痛。

因此蝙蝠与鸟不同，蝙蝠可以倒挂着。

故选B。

【点评】本题考点涉及推理判断，代词指代和主旨大意三个题型的考查，是一篇科研类阅读，要求考生根据上下文的逻辑关系，进行分析，推理，概括和归纳，从而选出正确答案。

4．犇犇阅读理解
Wolves strike fear into the hearts of many species, humans included. Our fear of them has brought them to the edge of dying out, as we have cruelly killed them as competitors and trouble-makers. But researchers are discovering that the very fear they put into prey（被捕食者）species is exactly what helps make ecosystems（生态）healthy.
Yellowstone National Park is a typical example of just how wolves can help repair an ecosystem. An October 2018 study analyzed 40 years of research on large animals inside the park.
"Yellowstone has benefited from the reintroduction of wolves in ways that we did not anticipate, especially the complexity of biological interactions（互动）in the park," explained Mark Boyce, a professor in the Department of Biological Sciences." We were really surprised at that and we'd never have seen these responses if the park hadn't adopted ecological-process management—allowing natural ecological processes to take place with least human intervention."
After the wolves were re-introduced at Yellowstone, willow and cottonwood trees increased in number. The population of bears and bison also rose and what was once a ruling deer-wolf interaction is now more diverse.
To learn more about just how wolves are beneficial, a short documentary from Quest explains how the presence of wolves influences the behavior of deer, which eventually makes entire 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 predator-prey relationships and changing the way we think about wolves.
The research is one more piece of evidence for why protecting these top predators is important not just for wolves as a species, but for hundreds of species at every level of an ecosystem. The fear they bring along may be the very angle that helps save them from dying out.
（1）What does the underlined word "anticipate" in paragraph 3 probably mean?
A. Expect.
B. Understand.
C. Notice.
D. Accept.
（2）For what purpose was a documentary made?
A. To introduce how wolves behave in the wild.
B. To show how wolves benefit from ecosystems.
C. To record how Aaron Wirsing observed wolves.
D. To study what good wolves can do to ecosystems.
（3）What is the significance of the research?
A. It proves wolves feed on hundreds of species.
B. It helps prove the importance of protecting wolves.
C. It shows the complex relationships between species.
D. It provides evidence that wolves are endangered animals.
（4）What is the main idea of the passage?
A. The fear of wolves is beneficial to ecosystems.
B. The fear of wolves put them in danger of disappearing.
C. Yellowstone National Park owes its healthy ecosystems to wolves.
D. 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】本文是一篇说明文，研究表明人类以及其他动物对狼的恐惧对维持健康、平衡的生态系统是有益的，其中黄石公园灰狼的引进就是一个典型的例子。

（1）考查词义猜测。

根据第三段中的"We were really surprised at that"可知，黄石公园在意想不到的方面从重新引入狼中获益。

故选A。

（2）考查细节理解。

根据第五段中的“To learn more about just how wolves are beneficial, a short documentary from Quest explains how the presence of wolves influences the behavior of deer, which eventually makes entire ecosystems more biologically diverse and healthy.”可知，拍摄纪录片的目的是了解狼是如何对生态有益的。

故选D。

（3）考查细节理解。

根据最后一段中的“The research is one more piece of evidence for why protecting 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，这项研究再次证明了为什么保护这些食肉动物不仅对狼这个物种很重要，而且对生态系统的各个层面的物种都很重要。

故这项研究的意义在于它有助于证明保护狼的重要性。

故选B。

（4）考查主旨大意。

本文主要讲述了人类以及其他动物对狼的恐惧对维持健康、平衡的生态系统是有益的，因为食草动物不会过度繁殖，从而保护了植物的生长。

故选A。

【点评】本题考点涉及细节理解，词义猜测和主旨大意三个题型的考查，是一篇科研类阅读，要求考生在捕捉细节信息的基础上，进一步根据上下文的逻辑关系，进行分析，推理，概括和归纳，从而选出正确答案。

5．犇犇Choose the one that fits best according to the information given in the passage you have just read.
Studies show that older people tend to remember the positive things in life rather than the negative things, while younger people remember the positive and negative equally well. The dominant psychological theory to explain this is that older people are aware of their limited time left, so they prioritize positive emotional experiences. But about a decade ago, I worked with biologist Robert Trivers on his idea that there was an evolutionary basis for older people's increased positive outlook. Our research took us in the fascinating direction of exploring how the body uses its energy.
When our ancestors needed more energy than usual, perhaps while being chased by a tiger, they had to get that energy from somewhere in the body. Could they borrow it from the brain? That organ uses 20 percent of our metabolic (新陈代谢) output, whether we are solving math problems or watching television reruns. Due to this constant energy requirement, borrowing energy from the brain when our need surpasses the available supply is not an option. Perhaps we could borrow energy from our muscles. Because we use far more muscle energy when we are active than when at rest, in principle, we could borrow energy when we are sitting. But the problem is that most of the energy-demanding emergencies of our ancestors required a muscular response. There was no way to borrow energy from our muscles during an emergency because relaxing when a tiger showed up was not an effective response. This brings us to our immune system, which, when strong, protects us from many illnesses and diseases. Like the brain, the immune system works at great metabolic cost, but largely in the service of keeping us healthy in the future. We have an enormous number of immune cells coursing through our body, a momentary break from production is fine. So, when our body needs extra energy, one of the places it goes is our immune function. When you're being chased by a tiger, you don't need to waste energy making immune cells to fight off tomorrow's cold. What you need is to shift all available energy resources to your legs, with the hope that you will live to experience another cough or sneeze.
As a result, our immune system evolved to run in maximum amounts when we're happy, but to slow down dramatically when we're not. With this background in mind, Trivers supposed that older people evolved a strategy of turning this relationship on its head, becoming more focused
on the positive things in life in an effort to enhance their immune functioning. This was helped along by their knowing much more about the world than younger adults, so they can deal with some of the unpleasant things in life more easily.
（1）According to Robert Trivers, when our body needs extra energy, ______.
A. muscles will respond to it by relaxing a little bit
B. organs will speed up metabolic processes to answer it
C. immune system will temporarily shut down to fulfill it
D. brain will satisfy it by sharing optional metabolic output
（2）In paragraph 3 "this relationship" most probably refers to the one between ______.
A. experiences and related knowledge
B. happiness and biological evolution
C. immune function and health
D. optimism and length of life
（3）What can be concluded from Robert Trivers' study?
A. Younger people adopt strategies of handling tense situations from everyday life.
B. Our ancestors evolved their immune systems in fighting against fierce animals.
C. Realizing that their days are numbered, older people prefer being positive.
D. Being negative drains energy from our body, lowering resistance to disease.
（4）Which of the following is the best title of the passage?
A. Brain, muscles and immune system
B. Age, health and happiness
C. Ancestors, emergency and evolution
D. Energy, effort and response
【答案】（1）C
（2）D
（3）D
（4）B
【解析】【分析】本文是一篇说明文，研究表明，老年人往往会记住生活中积极的事物，而不是消极的事物。

十年前作者与生物学家罗伯特·特里弗斯合作研究身体是如何使用能量的，他们的发现解释了这一现象。

（1）考查推理判断。

根据第二段中的“We have an enormous number of immune cells coursing through our body, a momentary break from production is fine. So, when our body needs extra energy, one of the places it goes is our immune function.”可知我们的身体里有大量的免疫细胞，暂时停止运作是可以的。

因此，当我们的身体需要额外的能量时，（我们的身体）会去找免疫系统。

由此可以推断，免疫系统会暂时停止来为身体提供额外的能量。

选C。

（2）考查词义猜测。

根据第三段中的 "becoming more focused on the positive things in life in an effort to enhance their immune functioning." 可知老人们更加关注生活中积极的事物，是为了增强他们的免疫功能。

也就是说积极与免疫功能之间有关系，越积极，免疫功能越强，就能活得越久，所有选项中D项（乐观与寿命）之间最切题，故选D。

（3）考查推理判断。

根据最后一段中的"As a result, our immune system evolved to run in maximum amounts when we're happy, but to slow down dramatically when we're not."可知当我们快乐时，我们的免疫系统进化到最大程度，但是当我们不快乐时，免疫系统会减弱。

由此推断，消极会消耗我们身体的能量，降低对疾病的抵抗力。

选D。

（4）考查主旨大意。

作者开头提出老年人更关注积极的事情，后文提到积极的情绪会增强免疫系统，所以本文主要讲的是年龄，健康与积极的情绪之间的关系，选B。

【点评】本题考点涉及推理判断，词义猜测和主旨大意三个题型的考查，是一篇科研类阅读，考生需要根据上下文的逻辑关系，进行分析，推理，概括和归纳，从而选出正确答案。

6．犇犇Choose the one that fits best according to the information given in the passage you have just read.
Escaping predators(食肉动物), digestion and other animal activities—including those of humans—require oxygen. But that essential ingredient is no longer so easy for marine life to obtain, several new studies reveal.
In the past decade ocean oxygen levels have taken a dive—an alarming trend that is linked to climate change, says Andreas Oschlies, an oceanographer at the Helmholtz Center for Ocean Research in Germany, whose team tracks ocean oxygen levels worldwide. "We were surprised by the intensity of the changes we saw, how rapidly oxygen is going down in the ocean and how large the effects on marine ecosystems are," he says. It is no surprise to scientists that warming oceans are losing oxygen, but the scale of the drop calls for urgent attention. Oxygen levels in some tropical (热带的) regions have dropped by an astonishing 40 percent in the last 50 years, some recent studies reveal. Levels have dropped less significantly elsewhere, with an average loss of 2 percent globally.
A warming ocean loses oxygen for two reasons: First, the warmer a liquid becomes, the less gas it can hold. That is why carbonated drinks go flat faster when left in the sun. Second, as polar sea ice melts, it forms a layer of water above colder, more salty sea waters. This process creates a sort of lid that can keep currents from mixing surface water down to deeper depths. And because all oxygen enters the surface, less mixing means less of it at depth.
Ocean animals large and small, however, respond to even slight changes in oxygen by seeking refuge in higher oxygen zones or by adjusting behavior, Oschlies and others in his field have found. These adjustments can expose animals to new predators or force them into food-scarce regions. Climate change already poses serious problems for marine life, such as ocean acidification, but deoxygenation is the most pressing issue facing sea animals today, Oschlies says. After all, he says, "they all have to breathe."
Aside from food web problems, animals face various other physiological challenges as their bodies adjust to lower oxygen levels. Chinese shrimp(虾) move their tails less vigorously to preserve energy in lower oxygen environments. Some creatures, such as jellyfishes, are more tolerant of low oxygen than others are. But all animals will feel the impact of deoxygenation because they all have evolved their oxygen capacity for a reason, says Oschlies. "Any drop in oxygen is going to damage survivability and performance," he says.
（1）According to the first two paragraphs, what worries scientists the most?
A. The worsening deoxygenation in the warming ocean.
B. The survival of predators and various marine animals.
C. The alarmingly changeable oxygen levels in the ocean.
D. The lack of attention to the warming of tropical oceans.
（2）Which of the following is a reason for the oxygen loss in the ocean?
A. Polar ice melting consumes much oxygen in the ocean.
B. Global warming reduces the amount of oxygen in the air.
C. The surface polar ice water prevents oxygen going down.
D. Salty water holds less gas in the increasingly warmer ocean.
（3）What can be inferred from the passage?
A. Ocean deoxygenation changes some animals' natural territories.
B. Ocean acidification is more serious a problem than deoxygenation.
C. Not all ocean animals are bothered by the decreasing oxygen levels.
D. Some animals reduce their movements in order to absorb more oxygen.
（4）Which of the following is the best title of the passage?
A. The Oxygen Levels of Marine Life
B. Ocean Warming Affects Food Web
C. The Survivability of Ocean Animals
D. The Ocean Is Running Out of Breath
【答案】（1）A
（2）C
（3）A
（4）D
【解析】【分析】本文是一篇说明文，介绍了海洋氧含量下降是一个与气候变化有关的令人担忧的趋势。

同时介绍了海洋氧含量下降的原因以及对海洋生物的影响和对其生存的威胁。

（1）考查细节理解。

根据第二段中的"It is no surprise to scientists that warming oceans are losing oxygen, but the scale of the drop calls for urgent attention. Oxygen levels in some tropical (热带的) regions have dropped by an astonishing 40 percent in the last 50 years, some recent studies reveal. Levels have dropped less significantly elsewhere, with an average loss of 2 percent globally."可知，对于科学家来说，变暖的海洋正在失去氧气并不奇怪，但这种下降的规模需要紧急关注。

一些最近的研究表明，在过去的50年里，一些热带地区的氧气含量下降了惊人的40%。

其他地区的降幅较小，全球平均降幅为2%。

所以根据前两段，科学家最担心的是变暖的海洋中日益恶化的脱氧现象。

故选A。

（2）考查细节理解。

根据第三段中的" as polar sea ice melts, it forms a layer of water above colder, more salty sea waters. This process creates a sort of lid that can keep currents from mixing surface water down to deeper depths. And because all oxygen enters the surface, less mixing means less of it at depth."可知，当极地海冰融化时，它会在更冷、更咸的海水上形成一层水。

这个过程会形成一种冰盖，它可以防止水流将地表水混合到海洋更深的深度。

因为所有的氧气都进入了表面，所以较少的与海洋水的混合意味着更深的海洋含氧量更少。

所以表面的极地冰水阻止氧气下沉是海洋缺氧的原因之一。

故选C。

（3）考查推理判断。

根据倒数第二段中的"Ocean animals large and small, however, respond to even slight changes in oxygen by seeking refuge in higher oxygen zones or by adjusting behavior, Oschlies and others in his field have found. These adjustments can expose animals to new predators or force them into food-scarce regions. "可知，然而，Oschlies和他所在领域的
其他人发现，无论大小，海洋动物对氧气的微小变化都有反应，它们在较高的含氧区寻求庇护，或是调整行为。

这些调整可能使动物暴露在新的掠食者面前，或迫使它们进入食物匮乏的地区。

所以海洋中氧含量减少迫使动物离开自己的栖息地，去氧气含量较高的地区寻求庇护。

故判断出海洋脱氧改变了一些动物的自然领地。

故选A。

（4）考查主旨大意。

通读全文可知，短文说明了海洋氧含量下降是一个与气候变化有关的令人担忧的趋势，海洋氧含量下降的原因以及对海洋生物的影响和对其生存的威胁。

所以短文主要是围绕着海洋氧含量下降而展开的。

故短文的最佳标题为"海洋快喘不过气来了"符合题意。

故选D。

【点评】本题考点涉及细节理解，推理判断和主旨大意三个题型的考查，是一篇环保类阅读，要求考生在捕捉细节信息的基础上，进一步根据上下文的逻辑关系，进行分析，推理，概括和归纳，从而选出正确答案。

7．阅读理解
In 1953, a mountain climber reported seeing a bar-headed goose soar over the peak of Mount Everest (珠穆朗玛). It was thought impossible. Now researchers who raised 19 of the geese—named for the black stripes on the backs of their heads—have shown the birds really fly so high. The team trained the youngsters to fly in a large wind tunnel wearing backpacks and face masks full of sensors that recorded their heart rate. blood oxygen levels, temperature, and metabolic rate—how many calories they burned per hour. The researchers simulated(模拟)10w-, medium-, and high-altitude conditions by altering the concentration of oxygen supplied to face masks worn by each goose as it flew in the tunnel.
Birds already have a better heart and lungs than mammals for sustained physical activity. And researchers knew that bar-headed geese have even larger, thinner lungs that let them breathe more deeply and an even bigger heart to pump more oxygen to muscles than other birds.
The wind tunnel experiments showed that when the concentration of oxygen was at its lowest-like the 7% found on top of Mount Everest versus 21% at sea level—the geese's heart rate and frequency of wing beats remained the same even as their metabolic rate dropped. Somehow, the birds managed to cool down their blood-the measured blood temperature dropped so it could take in more oxygen, the researchers report today in eLife. This cooling likely helps compensate for the very thin air, the team says.
Although well trained, the birds were only willing to stay in the air a few minutes-or less when wearing their backpacks and flying at 6ihigh" altitudes. So it's not clear whether these adaptations alone are what make it possible to fly the 8 hours it takes to climb over Mount Everest. But those few minutes showed these geese really could fly over the top of Mount Everest.（1）Why did the researchers raise 19 bar-headed geese and train them?
A. To test the flying height and speed of them.
B. To confirm they could fly over Mount Everest.。