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题型:阅读理解-阅读单选 难度:0.65 引用次数:123 题号:14810956

A new study shows that increases in extreme winter weather in parts of the US are linked to quickened warming of the Arctic (北极).

Over the past four decades, warming in the Arctic has been far more definite than that in the rest of the world and has caused a rapid decrease of summer sea ice. Heating in the Arctic has ultimately disturbed the circular pattern of winds known as the polar vortex (旋涡). As a result, it got stretched out of shape and slid southward off the pole. Scientists believe this vortex stretching process led to the deadly Texas cold wave in February this year.


“The polar vortex over the Arctic usually locks in cold air at the poles and does not easily move south. The stronger the winds, the more the air inside is kept, and the colder it gets,” explained lead researcher Dr. Judah Cohen, who’s a professor at the Massachusetts Institute of Technology (MIT). “Melting (融化) ice in the Arctic and rising temperatures can disturb the Arctic vortex, making cold air no longer locked in the Arctic? but move some farther south.”

The researchers say that their findings are based on both observations and modelling and they show a physical link between climate change in the Arctic, the stretching of the polar vortex and the impacts on ground.

The researchers believe their work could improve predictions about the beginning of extreme cold winter events. The research team also believes that their findings will help people understand that global warming is complex and perhaps let go of the idea that colder winters mean climate change isn’t happening. “In the past, these cold extremes over the US and Russia have been used to justify not reducing carbon, but there’s no longer any excuse to not start reducing emissions (排放) right away,’’ said Dr. Cohen.

1. What is paragraph 2 mainly about?
A.The efforts made by scientists.B.The definition of polar vortex.
C.The decrease of summer sea ice.D.The formation of Texas cold wave.
2. What is the function of polar vortex?
A.Making the wind stronger.B.Helping cold air move freely.
C.Speeding up the melting of ice.D.Keeping cold air from escaping.
3. What can be inferred from the last paragraph?
A.Global warming is just alarmist.
B.Weather-gone-wild pattern is a fantasy.
C.Reducing emissions is a pressing matter.
D.Weather forecast has never been a perfect science.
4. In which column of a website can the text probably be found?
A.Environment.B.Travel.C.Education.D.Life.
【知识点】 环境保护 说明文

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【推荐1】As a result of pollution,Lake Erie, on the borders of the USA and Canada, is now without any living things.

Pollution in water is not simply a matter of “poisons” killing large numbers of fish overnight. Very often the effects of pollution are not noticed for many months or years because the first organisms (生物体) to be affected are either plants or plankton(浮游生物). But these organisms are the food of fish and birds and other creatures.When this food disappears, the fish and birds die too. In this way a whole food chain can be wiped out, and it’s not until dead fish and water birds are seen at the river’s edge or on the seashore that people realize what is happening.

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So, if we want to stop this pollution,the answer is simple: sewage and industrial waste must be made clear before flowing into the water.It may already be too late to save some rivers and lakes, but others can still be saved if the correct action is taken at once.

1. Pollution of water is noticed ________.
A.when the first organisms are affected
B.when a good many fish and birds die
C.when poisonous things are poured into water
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3. Which of the following is harmful according to the passage?
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【推荐2】What were you doing when you were nine years old? Making crafts from a Klutz book? Kicking around a soccer ball? Designing a business plan to deal with plastic pollution and relieve childhood poverty? Zymal Umar showed us the latter. The Pakistan’s youngest businesswoman has started a project entitled Zee Bags, which aims to reduce plastic pollution by providing an environmentally-friendly alternative to plastic grocery bags.

When Zymal was on a shopping trip with her parents three years ago, she was shocked by the number of plastic bags on the streets. Depressed by the plastic pollution, she was reminded of the severe consequences our habits have on the environment. Then, she noticed a shopkeeper handing out newspaper bags. And at that moment, Zymal knew she had to act. Since then she has created beautiful, unique reusable newspaper bags for hundreds of customers.

It’s amazing to see this youngster using her brains and business skills for good. And she should certainly feel proud of the work she is doing. After all, plastic grocery bags are killing thousands of marine animals every year through their contribution to plastic waste. According to The Earth Institute, over one trillion plastic bags are used worldwide annually—that’s about two million bags used per minute around the world.

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But with Zee Bags, we’re all empowered to make more thoughtful choices about our trash production. And Zymal’s amazingness doesn’t stop there—the profits from her sales go towards helping poor children.

1. What is the second paragraph mainly about?
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“The return of wild beavers can help to recreate lost wetlands, with a knock-on effect that benefits other wildlife including insects, invertebrates and birds. Beavers also slow the flow of water, which can reduce flood risks to towns and villages,” she said.

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