Which of the following is the main cause of global warming?

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问题 Which of the following is the main cause of global warming?
  
Last week, a United Nations report said humans are very likely the cause of most of the temperature increases in the last 50 years. It said global warming is undeniable and the world can expect to feel the effects for centuries to come. The intergovernmental panel on climate change released the report in Paris at a conference of climate experts. Representatives of more than 100 governments agreed on the findings. This is the most detailed scientific report to date on global warming and the influence of fossil fuel burning and other human activities. The scientists say there is greater than a 90% chance that greenhouse gases are the main cause of rising temperatures and sea levels. The report also links global warming to other changes including increased dryness in some areas and violent storm patterns. The UN panel released its last climate change report 6 years ago. The scientists say the new report is based on studies done since then and stronger agreement on global warming. The new report makes no policy proposals, but the aim is to press governments and industries to cut the release of carbon dioxide and other gases blamed for trapping heat.

选项 A、there were fewer studies done
B、there were fewer policy proposals
C、there was less agreement
D、there were fewer objectives

答案C

解析 细节推断题。材料提到,“此次报告基于人们对全球变暖问题所持有的更高程度的一致性态度”,上一份报告发布以来,人们对全球变暖问题的认识更加一致了,故选C。解答推断题首先要找准录音中的关键词,如此题中的stronger一词,本题选项都涉及上一份报告与这次发表的报告的比较。若未听清关键词组strongeragreement,则易出错。本段材料主旨说对气候变暖问题的一致性看法(跨政府间的研讨等,强调一致),由此也可得到答案。
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