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When global warming finally came, it struck with a vengeance(报复). In some regions, temperatures rose several degrees in less tha
When global warming finally came, it struck with a vengeance(报复). In some regions, temperatures rose several degrees in less tha
admin
2016-03-05
26
问题
When global warming finally came, it struck with a vengeance(报复). In some regions, temperatures rose several degrees in less than a century. Sea levels shot up nearly 400 feet, flooding coastal settlements and forcing people to migrate inland. Deserts spread throughout the world as vegetation shifted drastically in North America, Europe and Asia. After driving many of the animals around them to near extinction, people were forced to abandon their old way of life for a radically new survival strategy that resulted in widespread starvation and disease. The adaptation was farming: the global-warming crisis that gave rise to it happened more than 10000 years ago.
As environmentalists convene in Rio de Janeiro this week to ponder the global climate of the future, earth scientists are in the midst of a revolution in understanding how climate has changed in the past and how those changes have transformed human existence. Researchers have begun to piece together an illuminating picture of the powerful geological and astronomical forces that have combined to change the planet’s environment from hot to cold, wet to dry and back again over a time period stretching back hundreds of millions of years.
Most importantly, scientists are beginning to realize that the climatic changes have had a major impact on the evolution of the human species. New research now suggests that climate shifts have played a key role in nearly every significant turning point in human evolution: from the dawn of primates(灵长类动物)some 65 million years ago to human ancestors rising up to walk on two legs, from the huge expansion of the human brain to the rise of agriculture. Indeed, the human history has not been merely touched by global climate change, some scientists argue, it has in some instances been driven by it.
The new research has profound implications for the environmental summit in Rio. Among other things, the findings demonstrate that dramatic climate change is nothing new for planet Earth. The benign(宜人的)global environment that has existed over the past 10000 years— during which agriculture, writing, cities and most other features of civilization appeared—is a mere bright spot in a much large pattern of widely varying climate over the ages. In fact the pattern of climate change in the past reveals that Earth’s climate will almost certainly go through dramatic changes in the future—even without the influence of human activity.
Scientists believe that human evolution______.
选项
A、has seldom been accompanied by climatic changes
B、has exerted little influence on climatic changes
C、has largely been effected by climatic changes
D、has had a major impact on climatic changes
答案
C
解析
根据第三段Indeed,the human history has not been merely touched by global climatechange,some scientists argue,it has in some instances been driven by it.可知人类历史的发展不只受到气候的影响,但是科学家认为,在一些事情上,人类历史的发展是受气候推动的。故C正确,很大程度上受到气候影响。
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