六级阅读理解练习
Unit 7
Part IIReading Comprehension Passage One
Questions 21 to 25 are based on the following passage.
When global warming finally came, it stuck with a vengeance. 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 10,000 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 pastand 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 planets environment from hot to cold, wet to dry and back again over a time period stretching back hundreds of millions of year.
Most important, 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 primatessome 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.
【六级阅读理解练习】相关文章：
英语阅读理解练习10-13
英语六级试题阅读理解模拟练习03-04
英语六级辅导试题阅读理解练习11-12
2017年六级阅读理解模拟练习试题08-07
最新英语六级考试阅读理解篇章练习08-16
英语六级阅读理解考前冲刺练习201708-22
2017年英语六级阅读理解练习试题10-30
最新大学英语六级阅读理解练习试题11-15
2017六级英语阅读理解精彩练习试题08-18
英语六级考试阅读理解专题练习201708-20