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题型:阅读理解-阅读单选 难度:0.65 引用次数:13 题号:19789282

In the past 50 years,the amount of water in the open ocean with zero oxygen has gone up more than fourfold.In coastal water bodies,including river mouths and seas,low-oxygen sites have increased more than tenfold since 1950.Scientists expect oxygen to continue dropping even outside these zones as Earth warms.

“Oxygen is fundamental to life in the Oceans,” said Denise Breitburg,a marine ecologist with the Smithsonian Environmental Research Centre.“The decline in ocean oxygen ranks among the most serious effects of human activities on the Earth’s environment.Actually,it’s a great loss to all the support services that rely on recreation and tourism,including hotels and restaurants and taxi drivers and everything else.The reverberations(严重影响) of unhealthy ecosystems in the ocean can be extensive.”

In areas traditionally called “dead zones”,like those in Chesapeake Bay and the Gulf of Mexico,oxygen plummets(大幅下跌) to so low levels that many animals die.As fish avoid these zones,their habitats become smaller and they’re easier to be attacked or caught.But the problem goes far beyond “dead zones”.Even smaller oxygen decline can prevent growth in animals,hinder reproduction and lead to disease or even death.It can also cause the release of dangerous chemicals such as nitrous oxide,a greenhouse gas up to 300 times more powerful than carbon dioxide.While some animals can boom in “dead zones”,overall biodiversity falls.

Climate change is the key criminal in the open ocean.Warming surface waters make it harder for oxygen to reach the inside of the ocean.Furthermore,as the ocean as a whole gets warmer,it holds less oxygen.In coastal waters,too much nutrient pollution from land creates algal blooms,which use up oxygen as they die and break down.

People’s livelihoods are also on the line,the scientists reported,especially in developing nations.Smaller fisheries(渔场) may be unable to relocate when low oxygen destroys their harvests or forces fish to move elsewhere.So we humans have to carry on a war now and win the war.

1. What does the first paragraph mainly talk about?
A.The ocean has been losing its oxygen.
B.The amount of sea water is increasing.
C.The coastal water bodies are dangerous.
D.Earth becomes warmer and warmer.
2. What can we infer from Denise Breitburg’s words?
A.Different oceans have different levels of oxygen.
B.The decline in ocean oxygen has great influences.
C.The future of tourism relies on the levels of ocean oxygen.
D.The decrease in ocean oxygen is the most serious environmental problem.
3. How does the “dead zone” affect sea animals?
A.It offers more food.
B.It forms dangerous gas.
C.It reduces their living areas.
D.It produces more carbon dioxide.
【知识点】 环境保护 说明文

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【推荐1】There has been a very serious decline in the numbers of shallow-water fish as a result of overfishing. People still want to eat fish, so the fishing industry must look at other sources, especially the deep waters of the Atlantic.     1    .

Conservation measures will have to be put in place if these deep-sea fish are to survive. Research on five such species shows that numbers have declined by between 87 percent and 98 percent.     2     Many species could well disappear if the present trend continues. These are species that have been swimming in our oceans for hundreds of millions of years.

The problem is emphasised by the fact that the decline in numbers happened in less than twenty years. Deep-sea fish take a long time to reproduce and normally live for many years.

    3     The average size of such fish also declined, with one species showing a 57 percent decline in average size. This is of particular concern, as large fish tend to produce more offspring than small ones.

None of these facts has been taken into account by the fishing industry. The deep-sea species have been caught as if they were the fast-breeding fish like sardine and herring.     4    

The damage done by overfishing goes beyond the sea environment. Millions of people make a living in the fishing industry.     5     Measures must be taken to not only conserve ecosystems, but also sustain livelihoods and ensure food security.

A.Billions of people rely on fish for protein.
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C.Unfortunately, their reproduction rate is very low.
D.This puts them in the category of “critically endangered”.
E.Overfishing is a major cause of decline in populations of ocean wildlife.
F.It is like killing elephants as if they reproduced at the same rate as rabbits.
G.This has resulted in a sharp decline in the numbers of many of the species caught.
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【推荐2】If the three Rs (reduce, reuse and recycle) is a guideline to save the planet, garbage-sorting is where the   efforts start. Since May 1, Beijing has started to carry out mandatory garbage-sorting in new efforts to better protect the environment. Under the new regulation, residents are required to classify household waste into four categories: kitchen, recyclable, hazardous and other waste. People who fail to sort their garbage properly can be fined from 50 to 200 yuan, reported Xinhua.

Some residential communities in Beijing have introduced rewards to encourage residents to sort their garbage. According to Xinhua, residents can earn points by classifying their domestic waste correctly and then exchange the points they accumulate for daily necessities such as soap.

Garbage sorting practices have reached over 70 percent of housing estates in 18 cities, including Shanghai,     Xiamen and Hangzhou, according to the Ministry of Housing and Urban-Rural Development. Shanghai first enacted a mandatory garbage-sorting regulation in July 2019 and has had a 90 percent compliance (服从) rate among its housing estates.

According to a report by the Ministry of Ecology and Environment, over 90 percent of the public believe that garbage-sorting is important for the protection of the environment. However, garbage-sorting is still a big problem in China. Only 30 percent of participants said they think they are completely sorting their waste, the report noted. According to Xinhua, it’s partly because many people lack the willingness to sort their own waste. Also, some previous garbage regulations didn’t include fines for people who failed to obey them.

“It’s a must to have a legal guarantee to promote garbage sorting,” Liu Jianguo, a professor from Tsinghua University, told China Daily, “Aside from China, many countries like Germany, Spain and Britain, also ask people to sort waste into specific categories. In Japan, there is a fixed time for the sorting of each kind of garbage and littering.”

1. What can we learn about the new regulation in Beijing?
A.It hasn’t been put into use yet.
B.Residents can sort the garbage as they like.
C.People can get money if they classify their domestic waste correctly.
D.Those who can’t sort the garbage as the new rule requires shall be fined.
2. What’s the problem in garbage sorting in China?
A.Most people are unaware of its importance in protecting environment.
B.Some people don’t want to take the trouble to sort the garbage.
C.Only residents in big cities can sort the trash correctly.
D.The government doesn’t have enough money to support garbage sorting.
3. What can we infer from Liu Jianguo’s words?
A.It’s difficult to carry out garbage sorting in China.
B.Some laws in garbage-sorting are needed.
C.People in developed countries can better sort the garbage.
D.We should learn from Japan.
4. What’s the best title of the passage?
A.Garbage sorting, a new start in ChinaB.New regulations in Beijing
C.Argument on garbage sortingD.How to sort domestic garbage
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【推荐3】According to the Solar Energy Industry Association, the number of solar panels installed(安装)has grown rapidly in the past decade, and it has to grow even faster to meet climate goals. But all of that growth will take up a lot of space, and though more and more people accept the concept of solar energy, few like large solar panels to be installed near them.

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