According to the WHO, 90 percent of the world...

According to the WHO, 90 percent of the world’s population lives in a place where they are exposed to unsafe levels of airborne pollutants, contributing to up to seven million deaths each year. If you live in a city, chances are that you’re part of that 90 percent, even if your city is relatively clean. That’s why cities worldwide have started embracing Internet of Things (IoT)solutions.

One of the best ways to fight pollution is to figure out where it’s worst and where it’s coming from. If you’ve ever made a habit of checking air quality around you, you may notice that there aren’t actually that many monitoring stations, and your closest one may not be that close. For pollution data to really be accurate and helpful, we need a lot more of it.

Luckily, IoT sensors and low-power wide-area networks are making it a lot easier to get and spread ultra-local data. Lampposts are one popular place to put them. For example, the Republic of Korea and Barcelona have already built out a network of pollution sensors in their streetlights. On the other hand, outfitting (配备) cars, bikes, and even people with pollution sensors provides valuable data on a smaller, more mobile scale.

Since pollutant levels can change dramatically even from one city block to another, having smaller-scale data is important for making a lot of decisions that, over time, might have a major influence on our health and behavior. It can influence where we decide to live, when we exercise, whether we bike to work, and, perhaps most importantly, what we can do about pollution in our area.

What all the Internet of Things can help us do on a personal level is use less energy. The data it provides, though, can be used to make big and small changes to the way we behave and build, and that is eventually where we’ll see benefits.

1.What’s the problem mentioned in Paragraph 1?

A.The death rate is high every year. B.There are too many people in the world.

C.There is little space for people to live in. D.Air pollution is more serious than expected.

2.How does the author mainly develop Paragraph 3?

A.By analyzing main causes. B.By citing research findings.

C.By giving specific examples. D.By making close comparisons.

3.Why is it necessary to collect data on a smaller scale?

A.It directly decreases pollutant levels. B.It uses less energy to clean the air.

C.It covers more areas of air pollution. D.It betters decisions on our lifestyle.

4.What’s the author’s attitude towards using IoT to solve air pollution?

A.Disapproving. B.Doubtful.

C.Positive. D.Uncaring.

高二英语阅读理解中等难度题查看答案及解析

According to the United Nations, an aging society refers to one ____ 10 percent or more of the population is over 60, or 7 percent or more is over 65.

A. where           B. when             C. which            D. that

高二英语单项填空简单题查看答案及解析

According to a UN report，one third of the world population have no _________ to clean drinking water and health care.

A. means        B. approach        C. channel                 D. access

高二英语单项填空困难题查看答案及解析

According to a UN report, one third of the world population have no _________ to clean drinking water and health care.

A. means            B. approaches            C. ways                D. access

高二英语单项填空中等难度题查看答案及解析

In 1800, only three percent of the world's population lived in cities. Only one city — Beijing — had a population of over a million. Most people lived in rural areas, and never saw a city in their lives. In 1900, just a hundred years later, roughly 150 million people lived in cities, and the world’s ten largest cities all had populations exceeding one million. By 2000, the number of city dwellers exceeded three billion; and in 2008, the world's population crossed a tipping point — more than half of the people on Earth lived in cities. By 2050, that could increase to over two-thirds. Clearly, humans have become an urban species.

In the 19th and early 20th centuries, many people viewed cities negatively — crowded, dirty environments full of disease and crime. They feared that as cities got bigger, living conditions would worsen. In recent decades, however, attitudes have changed. Many experts now think urbanization (城市化) is good news, offering solutions to the problems of Earth’s growing population.

Harvard economist Edward Glaeser, author of The Victory of the Cir, is one such person. Glaeser argues that cities are very productive because “the absence of space between people” reduces the cost of transporting goods, people, and ideas. While the flow of goods has always been important to cities, what is most important today is the flow of ideas. Successful cities enable people to learn from each other easily, and attract and reward smart people with higher wages.

Another urbanization supporter is environmentalist Stewart Brand. Brand believes cities help the environment because they allow haft of the world’s population to live on about four percent of the land. This leaves more space for open country, such as farmland. City dwellers also have less impact per person on the environment than people in the countryside. Their roads, sewers, and power lines need fewer resources to build and operate. City apartments require less energy to heat, cool, and light. Most importantly, people in cities drive less so they produce fewer greenhouse gases per person.

So it’s a mistake to see urbanization as evil; it’s a natural part of development. The challenge is how to manage the growth.

1.What is Paragraph 1 mainly about?

A.The history of modern cities.

B.Changes taking place within cities.

C.How cities have grown over time.

D.Why modern cities are changing.

2.How have experts’ attitudes towards cities changed in recent decades?

A.They now view the weaknesses as strengths.

B.They no longer see city-riving as attractive.

C.They accept city life in spite of its problems.

D.They think city-riving provides more benefits.

3.Which of the following would Edward Glaeser agree with?

A.Cities provide more economic opportunities.

B.City people get along better with each other.

C.Over-crowded cities result in problems.

D.Cities limit the flow of ideas.

4.According to Paragraph 4, what would be the result of moving people out of cities?

A.Economic production would be reduced.

B.There would be less farmland available.

C.People would travel less frequently.

D.House values would fall greatly.

高二英语阅读理解中等难度题查看答案及解析

In 1800, only three percent of the world's population lived in cities. Only one city — Beijing — had a population of over a million. Most people lived in rural areas, and never saw a city in their lives. In 1900, just a hundred years later, roughly 150 million people lived in cities, and the world’s ten largest cities all had populations exceeding one million. By 2000, the number of city dwellers exceeded three billion; and in 2008, the world's population crossed a tipping point — more than half of the people on Earth lived in cities. By 2050, that could increase to over two-thirds. Clearly, humans have become an urban species.

In the 19th and early 20th centuries, many people viewed cities negatively — crowded, dirty environments full of disease and crime. They feared that as cities got bigger, living conditions would worsen. In recent decades, however, attitudes have changed. Many experts now think urbanization (城市化) is good news, offering solutions to the problems of Earth’s growing population.

Harvard economist Edward Glaeser, author of The Victory of the Cir, is one such person. Glaeser argues that cities are very productive because “the absence of space between people” reduces the cost of transporting goods, people, and ideas. While the flow of goods has always been important to cities, what is most important today is the flow of ideas. Successful cities enable people to learn from each other easily, and attract and reward smart people with higher wages.

Another urbanization supporter is environmentalist Stewart Brand. Brand believes cities help the environment because they allow haft of the world’s population to live on about four percent of the land. This leaves more space for open country, such as farmland. City dwellers also have less impact per person on the environment than people in the countryside. Their roads, sewers, and power lines need fewer resources to build and operate. City apartments require less energy to heat, cool, and light. Most importantly, people in cities drive less so they produce fewer greenhouse gases per person.

So it’s a mistake to see urbanization as evil; it’s a natural part of development. The challenge is how to manage the growth.

1.What is Paragraph 1 mainly about?

A. The history of modern cities.

B. Changes taking place within cities.

C. How cities have grown over time.

D. Why modern cities are changing.

2. How have experts’ attitudes towards cities changed in recent decades?

A. They now view the weaknesses as strengths.

B. They no longer see city-riving as attractive.

C. They accept city life in spite of its problems.

D. They think city-riving provides more benefits.

3. Which of the following would Edward Glaeser agree with?

A. Cities provide more economic opportunities.

B. City people get along better with each other.

C. Over-crowded cities result in problems.

D. Cities limit the flow of ideas.

4.According to Paragraph 4, what would be the result of moving people out of cities?

A. Economic production would be reduced.

B. There would be less farmland available.

C. People would travel less frequently.

D. House values would fall greatly.

高二英语阅读理解中等难度题查看答案及解析

In the United States, 30 percent of the adult (成年人) population has a “weight problem”. To many people, the case is clear: we eat too much. But scientific evidence（证据）does little to support the idea. Going back to the America of 1910, we find that people were thinner than today. Yet they ate more food. In those days, people worked harder physically, walked more, used machines much less, and didn’t watch TV.

Several modern studies, moreover, have shown that fat people do not eat more on average (平均) than thinner people. In fact, some investigations (调查), such as a 1990 study of 3,545 London office workers, show that fatter people eat less than slimmer people.

Studies show that slim people are more active than fat people. A study by a research group of Stanford University School of Medicine found the following interesting facts:

The more the men ran, the more fat they lost.

The more they ran, the more they ate.

Thus, those who ran the most ate the most, yet lost the greatest amount of body fat.

1.What kind of physical problem do many adult Americans have?

A. They are too thin.                 B. They work too hard.

C. They are too fat.                  D. They lose too much fat.

2.Which of the following words can take the place of the word “slim” in this passage?

A. poor         B. thin          C. healthy       D. rich

3.Compared with the adult American population today, the Americans of 1910 ______.

A. ate more food and had more activities       B. ate less food but had more activities

C. ate less food and had less physical activities  D. had more weight problems

4.What have modern medical and scientific researches reported to us?

A. Fat people eat less food and are less active.

B. Fat people eat more food than slim people but are less active.

C. Fat people eat more food than slim people but are more active.

D. Thin people run less, but have greater increase in food intake.

高二英语阅读理解中等难度题查看答案及解析

Elephants born without tusks(长牙) normally make up just 2 to 6 percent of the herd population. However, that is not the case at Mozambique’s Gorongosa National Park, where 33 percent of female elephants born after the country’s civil war ended in 1992 are tuskless. While that might be just a coincidence(巧合), Joyce Poole, an elephant behavior expert, has another theory.

The researcher thinks we may be witnessing an unnaturally evolution of the species due to the hunting of the elephants for their valuable tusks. Unlike our permanent teeth, tusks of elephants grow throughout the animal’s life, becoming longer and thicker with age. For decorative purposes, poachers usually first target older males due to their impressive tusks, and females are not spared either. As a result, in areas where hunting goes unchecked for long, the number of tuskless females increases. This allows them to gain a biological advantage, resulting in a larger than average population of female offspring (后代)with no tusks.

Poole believes this phenomenon explains the rise in the number of tuskless females at Gorongosa National Park. The researcher says before the war, the park was home to over 4,000 elephants. However, by the time the conflict ended in 1992, about 90 percent of the elephants had been slaughtered for tusks to help finance weapons and meat to feed the soldiers. Of the less than 200 survivors, over 50 percent of the females had no tusks. Hence, it is not surprising that the park’s tuskless elephant population has grown greatly.

So far, the hunting has largely influenced female elephants. Poole explains, “Very few males are tuskless because males require tusks for fighting. Without tusks, males have a much harder time breeding and do not pass on their genes(基因) as often as tusked ones.” If the hunting of males for tusks continues at this pace, it could result in a generation of elephants with much smaller tusks.

1.How does the writer draw readers’ attention to the topic?

A.By comparing figures. B.By offering explanation. C.By giving an example.　　　　　　　　　 D.By introducing an expert.

2.What might be the reason for the increase of tuskless females?

A.Illegal hunting. B.Pure coincidence.

C.Natural evolution. D.Effective protection.

3.What does the underlined word “slaughtered” in Paragraph 3 mean?

A.Raised. B.Protected. C.Killed. D.Trained.

4.What is the text mainly about?

A.The future of African elephants.

B.The protection of African elephants.

C.The increasing number of tuskless elephants.

D.The genetic consequence of hunting elephants.

5.In which section of a newspaper may this text appear?

A.Health. B.Science. C.Education. D.Finance.

高二英语阅读理解中等难度题查看答案及解析

In 2016, nearly 57 percent of American households owned a pet, according to the American Vets （兽医）Medical Association, but it's safe to say that 100 percent of them wish their dog or cat to live longer. In fact, advances in veterinary medicine have made it easier than ever to lengthen your pet's life. However, there are so many care options available that finding the ones that are worthwhile for your pet can be time-consuming. 1.

Watch Their Weight

About 60 percent of cats and 56 percent of dogs are over-weight or obese. 2. For example, overweight increases the risk of conditions like diabetes （糖尿病）,some cancers, and certain breathing problems. And being overweight shortened dogs’ life by up to 2.5 years compared with their ideal-weight peers.

Visit the Vet

3. " Because pets age more quickly than humans, their problems may worsen fast. ” says Pete Lands, director of emergency at Saint Francis Veterinary Center in Swedesboro, New Jersey. So keep up on routine treatments.

4.

Pets need daily workouts to stay healthy, so a formal workout plan is a good idea. Aim for between 30 minutes and two hours of daily activity, such as walking or running. Athletic breeds will require more exercise, while smaller dogs such as bulldogs can benefit from a short walk around the neighborhood. And believe it or not, some devices can track your pet's steps, heart rate, and other indicators.

Brush Their Teeth

According to Banfield Pet Hospital, 68 percent of cats and 76 percent of dogs have dental disease. 5. To avoid that, brush your pet's teeth every day. You should also get your pet's teeth professionally cleaned by your vet at least once a year.

A. Make an Exercise Plan.

B. That can lead to big trouble.

C. Accompany your pets every day.

D. This guide is a good place to start.

E. And it may be linked to the development of heart and kidney disease.

F. With the right care, you can improve the quality and quantity of life for your pets.

G. As with humans, early exams can spot problems soon enough for successful treatment.

高二英语七选五中等难度题查看答案及解析

According to a new study from Cornell University, about one-fifth of the global population, of 2 billion people worldwide, will be forced to resettle or go deeper inland by 2100 due to the continuous rise in sea level.

The study, published in the journal Land Use Policy, showed that the growing global population could make the matter worse. The researchers expected that there are about 1.4 billon “climate change refugees(难民)” in the world by 2060 and by 2100 the number of the displaced people due to the rising sea level could reach up to two billion.

“We’re going to have more people on less land and sooner than we think,” said lead author Charles Geisler, professor at Cornell. “The future rise in global average sea level probably won’t be gradual. Yet few policy makers are observing the significant barriers that coastal climate refugees, like other refugees, will run into when they move to higher ground.”

For the study, the researchers reviewed(回顾) potential problems that climate change refugees may face if they go deeper inland. The researchers identified these land difficulties with relocation using three organizing groups. Including depletion(损耗) zones, win-lose zones and no-trespass(不得擅自进入) zones. By doing so, the researchers were able to provide primary estimates of their toll(损失) on inland resettlement space. The researchers found that some inland regions were unlikely to support new waves of climate change refugees due to the remains of war, road developments and rare natural resources.

Apart from the rising sea level, increasing storm weather and the booming global population are also having a huge influence on the number of climate change refugees. Storm can push seawater further inland. The increasing global population requires more land even as the ocean swallows up rich costal zones and river deltas(三角洲). These force people to search for new places to move to higher ground.

1.What would happen if the sea level were to rise?

A.2 billion people would be “refugees” by 2060.

B.50% of the population would lose their homes.

C.Inland regions would become more crowded.

D.Coastal regions would be polluted seriously.

2.What can be inferred from Charles Geisler’s words?

A.The sea level will go up in a little-by-little way.

B.Moving to higher land isn’t the key solution.

C.Land and population vary according to climate change.

D.Policy makers should think more for climate change refugees.

3.Why do climate change refugees fail to move to some inland regions?

A.Because they can’t live a common life there.

B.Because they can’t adapt to the climate there.

C.Because they may consume more than expected.

D.Because they will destroy the natural resources.

4.What does the author stress in the last paragraph?

A.Global warming is a double-edged sword.

B.In the future climate will become worse.

C.The earth will see more climate change refugees.

D.Sea will bring humans more disadvantages.

高二英语阅读理解困难题查看答案及解析