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阅读下列材料,在空白处填入适当的内容(一个单词)或括号内单词的正确形式。 From the “Roman Warm Period” to the “Little Ice Age” that began...
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阅读下列材料,在空白处填入适当的内容(一个单词)或括号内单词的正确形式。
From the “Roman Warm Period” to the “Little Ice Age” that began in the 14th century, periods of hot and cold weather1. (extend) for centuries. As a result, many have argued that the current period of global warming2.(be) part of a natural pattern and the human role in creating3. has been exaggerated.
This new study suggests that is not4. case. Scientists reconstructed the major climate events of the past 2,000 years by looking around 700 records, tree rings, ice cores and lake sediments(沉淀物) 5. (include). Not one single event affected as much of the world6.the present period of warming is now doing. Other scientists7. have looked at the study have been impressed by the quality of the research.
The researchers involved argue that the new 8. (finding) reveal many theories put forward by climate scientists9. (explain) the rise in temperatures, including changes in solar activity. The current period of climate change is mainly down to humans, they insist. Natural causes, they say, are10. (simple) not sufficient to explain the warming scene over the last century and a half.
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