2. 外语
  3. Man-made climate change is "unequivocal(毋庸置疑的)" and demands urgent action. Yesterday’s report from the Intergovernmental Panel o

Man-made climate change is "unequivocal(毋庸置疑的)" and demands urgent action. Yesterday’s report from the Intergovernmental Panel o

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问题     Man-made climate change is "unequivocal(毋庸置疑的)" and demands urgent action. Yesterday’s report from the Intergovernmental Panel on Climate Change underlined the former point,【C1】______discussions at the World Economic Forum in Davos last week demonstrated the growing consensus on the【C2】______. The challenge now is action.
    The IPCC’s warning is serious: temperatures are likely to【C3】______by about 3℃ by 2100, with a【C4】______of 2℃ to 4.5℃. The latter would be close to the difference【C5】______the hast ice age and today.
    Adaptation is going to be part of the response, not least【C6】______a substantial rise in temperatures is already on the way: the stock of greenhouse gases in the【C7】______now is already 50 percent【C8】______pre-industrial levels. But it is also essential to【C9】______growth in the stock, ideally to【C10】______it below 550 parts per million, which would【C11】______be double the pre-industrial levels.
    On present trends, the atmosphere is【C12】______to reach such a concentration in just three decades. To【C13】______levels rising further, emissions will need to be reduced【C14】______at least 50 per cent below what Sir Nicholas Stern called "business as usual" --【C15】______is, the continuation of historic trends--by then.
    The good news,【C16】______the Stern review of climate change, is that the economic【C17】______of achieving these objectives【C18】______be as little a 1 per cent of global gross product. However, the【C19】______news is that big changes to long-lived investment decisions will be required soon,【C20】______in the power sector.
【C1】
选项 A、but
B、when
C、and
D、while
答案D
解析 逻辑衔接题。本句的意思是政府间气候变化问题小组上周五发布的报告突显了前者，而此前在达沃斯世界经济论坛上的讨论表明，与会各方正就后者逐渐达成共识。根据上下文，前后两个分句之间是对比说明的关系，而并无强烈的转折关系，也并非并列关系。因此选项D)正确。
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