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A decade ago, the idea that the planet was warming up as a result of human activity was largely theoretical. We knew that since
A decade ago, the idea that the planet was warming up as a result of human activity was largely theoretical. We knew that since
admin
2014-12-31
47
问题
A decade ago, the idea that the planet was warming up as a result of human activity was largely theoretical. We knew that since the Industrial Revolution began in the 18th century, factories and power plants and automobiles and farms have been loading the atmosphere with heat-trapping gases, including carbon dioxide and methane(甲烷). But evidence that the climate was actually getting hotter was still murky.
Not anymore. As an authoritative report issued a few weeks ago by the United Nations-sponsored Intergovernmental Panel on Climate Change makes plain, the trend toward a warmer world has unquestionably begun. Worldwide temperatures have climbed more than 0.5℃ over the past century, and the 1990s were the hottest decade on record. After analyzing data going back at least two decades on everything from air and ocean temperatures to the spread and retreat of wildlife, the IPCC asserts that this slow but steady warming has had an impact on no fewer than 420 physical processes and animals and plant species in all countries.
Glaciers(冰川), including the legendary snows of Kilimanjaro, are disappearing from mountaintops around the globe. Coral reefs are dying off as the seas get too warm for comfort. Drought is the norm in parts of Asian and Africa. El Nino(厄尔尼诺)events, which trigger devastating weather in the eastern Pacific, are more frequent. The Arctic permafrost(永久冻土带)is starting to melt. Lakes and rivers in colder climates are freezing later and thawing earlier each year. Plants and animals are shifting their ranges pole-ward and to higher altitudes, and migration patterns for animals as diverse as polar bears, butterflies and beluga whales are being disrupted.
The problem of global warming______.
选项
A、has been predicted since the Industrial Revolution began
B、was noticed 10 years ago as a realistic threat
C、has nothing to do with human activity
D、was theoretical 10 years ago but is not now
答案
D
解析
细节题。本题的定位在“A decade ago,the idea that the planet was warmingup as a result of human activity was largely theoretical”,“but evidence that the climatewas actually getting hotter was still murky…not anymore”即十年前.这种观点只是理论上的,证据是模糊的,而现在再不是了。故选D。
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0
大学英语四级
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