2. 外语
  3. The Intergovernmental Panel on Climate Change (IPCC) was set up in 1988 to assess information on climate change and its impact.

The Intergovernmental Panel on Climate Change (IPCC) was set up in 1988 to assess information on climate change and its impact.

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问题     The Intergovernmental Panel on Climate Change (IPCC) was set up in 1988 to assess information on climate change and its impact. Its Third Assessment Report predicts global temperature rises by 2100 of between 1.4℃ and 5.8℃. Although the issue of the changing climate is very complex and some changes are uncertain, temperature rises are expected to affect countries throughout the world and have a knock-on effect with sea-level rises.
    Scientists have argued about whether temperature rises are due to human activities or due to natural changes in our environment. The IPCC announced in 2001 that "most of the warming observed over the last 50 years is likely to be attributable to human activities". This was a more forceful statement than in 1996 when the Second Assessment Report stated that there was a "discernible human influence on the climate" which was the first time they had concluded such a link. Many experts believe the faster the climate changes, the greater the risk will be.
    Key points of the projections for climate change globally include that by the second half of the 21st century, wintertime rainfall in the northern mid to high latitudes and Antarctica will rise, that meanwhile Australia, Central America and southern Africa are likely to see decreases in autumn precipitation, that some land areas in the tropics will see more rainfall, and that there will generally be more hot days over land areas.
When did the IPCC first reach the conclusion that human activities have an influence on the climate?
选项 A、1998
B、1996
C、2001
D、1995
答案B
解析 题目问IPCC第一次得出人类影响气候这一结论的时间。根据关键词first reach the conclusion定位至第2段倒数第2句。该句提到，1996年的第二次评估报告指出人类对气候有明显的影响 (discernible human influence on the climate)，这是他们第一次得出这样的结论。故答案选B项。A项“1998年”是IPCC成立的时间。C项“2001年”IPCC也有宣布人类和气候变暖的关系，但并非是第一次提出，故排除。D项的时间点在文中没有被提及。
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