2. 外语
  3. It can be concluded that a concentration of carbon dioxide in the atmosphere would ______. Although the fuel consumption is gre

It can be concluded that a concentration of carbon dioxide in the atmosphere would ______. Although the fuel consumption is gre

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问题 It can be concluded that a concentration of carbon dioxide in the atmosphere would ______.
Although the fuel consumption is greater in the northern hemisphere, temperatures there seem to be falling. This is ______.
选项 A、exclusively due to the effect of the inertia of the earth’s climate
B、partly due to variations in the output of solar energy
C、possibly because the levels of carbon dioxide are rising
D、possibly because the ice caps in the poles are melting
答案B
解析 细节题。第六段分析了太阳对地球气候产生的影响。该段最后一句说，太阳发出的热量也有周期性变化，而最新的趋势就是热量下降。这就是地球北半球气温下降的原因。
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