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  3. New ice core samples taken from the centre of the Greenland ice-sheet have given a detailed record of the last "interglacial per

New ice core samples taken from the centre of the Greenland ice-sheet have given a detailed record of the last "interglacial per

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问题     New ice core samples taken from the centre of the Greenland ice-sheet have given a detailed record of the last "interglacial period(间冰期)" which range from about 135,000 to 115,000 years ago. The cores, taken from a depth of 2,780 to 2,870 metres, show that during this period the climate oscillated(摆动) between three stages instead of remaining in one, as in the whole of recorded human history. The middle stage was like our own, but the others were either much colder or warmer.
    Worse, it seems that the climate flipped from one condition to another very rapidly. "It apparently took very little time, perhaps less than a decade or two, to shift between the stages," Dr. J. CW. White of the Institute of Arctic and Alpine Research at the University of Colorado wrote earlier this year in the scientific journal, Nature-. "We humans have built a remarkable socio-economic system during perhaps the only time when it could be built, when the climate was stable enough to let us develop the agricultural infrastructure (基础设施)required to maintain an advanced society. "
    We do not know why we have been so blessed. But if the Earth had an operating manual, the chapter on climate might begin with a warning that the system has been adjusted at the factory for optimum comfort—so don’t touch the dials.
    Unfortunately, we have been "twiddling the knobs(旋钮)" for decades. In December 1995 the official Intergovernmental Panel on Climatic Change (IPCC), which represents the work of 2, 000 top meteorologists from around the world, concluded that global warming due to human activities is probably already taking place. Global warming sounds deceptively favorable to inhabitants of countries which currently experience harsh winters. In fact, with global warming, the world would struggle to cope with the effects of even a steady, gradual warming. This was spelt out to members of the British Royal Society by Sir John Houghton, chairman both of Britain’s Royal Commission of Environmental Pollution and of one of the main IPCC working groups. Houghton put forward the IPCC picture of seas flooding much of Egypt, Southern China and Bangladesh, making "many millions" of people homeless} of hordes of "environmental refugees" and of wars breaking out over dwindling (becoming gradually smaller) fresh water supplies, as world rainfall patterns changed.
    There is at least a chance that the world could adapt to steady warming if it happened slowly enough. However, many scientists, believe that even this prediction from the IPCC is too cautious.
Which of the following is NOT true according to the passage?
选项 A、The climate in recorded human history has generally remained stable.
B、The climate from about 135,000 to 115,000 years ago was in an extremely cold state.
C、The human race has been lucky to have enjoyed the most favorable period Of climate for them to build a socio-economic system.
D、The evidences scientists collected from the ice cores suggest that a civilization cannot have arisen in the period from about 135,000 to 115,000 years ago.
答案B
解析 是非判断题。四个选项的相关内容在文章的第一段和第二段。将第一段第二句中的during this period the climate oscillated between three stages instead of remaining in one，as in the whole of recorded human history(这一时期里，气候在三个阶段摆动变化，而不是像有文字记载的人类历史上的气候那样保持在一种状态)与第二段联系起来，我们可得到这样的结论：在那时(135 000年～115 000年之前)人类是不可能生存发展的；在有记载的人类历史上，气候是相对稳定的；我们人类有幸获得了地球上也许是唯一的一段有利的气候时期才发展至今。A、C、D符合文意，所以符合题干要求的答案是B。
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