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单选题

A．They investigated the ice．
B．They analyzed the water content．
C．They explored the ocean floor．
D．They measured the depths of sea water．

参考答案A

解析:Earlier this year，[19]British explorer Pen Hadow and his team tiekked for three months across the frozen Arctic Ocean,taking measure-merits and recording observations about the ice．
“Well，we’d been led to believe that we would encounter a good proportion，of this older,thicker,
technically multi-year ice that’s been around for a few years and just gets thicker and thicker．We actually found there wasn’t any multi-year ice at all．”
[20] Satellite observation and submarine surveys over the past f?w years had shown less ice in the polar region,but the recent measurements show the loss is more pronounced than previously
thought．
“We’re looking at roughly 80 percent loss of ice cover on the Arctic Ocean in 10 years，roughly ten years．and 100 percent loss in nearer 20 years．”
[21] Cambridge scientist Peter Wadhams, who's been measuring and monitoring the Arctic since 197 I says the decline is irreversible．
“The more you lose，the more open water is created，the more warming goes on in that open water during the summer．the less ice forms in the winter,the more melt there is the following summer．It becomes a breakdown process where everything ends up accelerating until it’s all gone．’’
Martin Sommerkorn runs the Arctic program for the environmental charity the World Wildlife Fund．"The Arctic sea ice holds a central position in the Earth’s climate system and it’s deteriorating faster than expected．Actually it has to translate into more urgency to deal with the climate change problem and reduce emissions．”
Sommerkorn says a plan to reduce green—house gas emissions blamed fbr global warming needs to come out of the Copenhagen Climate change summit in December．
“We have to basically achieve there the commitment to deal with the problem now．That’s the minimum．We have to do that equitably and we have to find a commitment that is quick．” Wadhams echoes the need for urgency．
“The carbon that we’ve put into the atmosphere keeps having a warming effect for 100 years，so we have to cut back rapidly now,because it will take a long time to work its way through into fl response by the atmosphere．We can’t switch off global warming just by being good in the future，we have to start being good now．’’
[22] Wadhams says there is no easy techno-fix to climate change．He and other scientists say there are basically two options to replacing fossil fuels，generating energy with renewables，or embracing nuclear power．
Q：What did Pen Hadow and his team do in the Arctic Ocean?
【解析】A。讲座开头提到，英国探险家潘·哈多和他的团队艰难跋涉三个月，穿越冰冻的北冰洋，测量当地冰层并记录了观测数据。A是对讲座原文的同义转述，其中的investigated相当于讲座中Staking measurements and recording observations about。

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单选题

A．The ice decrease is more evident than previously thought．
B．The ice ensures the survival of many endangered species．
C．Most of the ice was accumulated over the past centuries．
D．Eighty percent of the ice disappears in summer time．

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单选题

A．The melting Arctic ice has drowned many coastal cities．
B．Arctic ice is a major source of the world’s flesh water．
C．Arctic ice is essential to human survival．
D．The decline of Arctic ice is irreversible．

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单选题

A．There is no easy technological solution to it．
B．It will advance nuclear technology．
C．There is no easy way．to understand it．
D．It will do a lot of harm to mankind．

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