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  3. PASSAGE TWO What does Claussen think to be the main cause of the increased vegetation in deserted areas?

PASSAGE TWO What does Claussen think to be the main cause of the increased vegetation in deserted areas?

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问题 PASSAGE TWO
What does Claussen think to be the main cause of the increased vegetation in deserted areas?
选项
答案Hotter air has more capacity to hold moisture．
解析 根据第4段第3句可知，植被大面积增长有可能是因为空气变热后，得以携带更多的湿气(more capacityto hold moisture)，继而可以转化为更多的雨水；第5段克劳森又指出空气携带水分的能力(water-holdingcapacity)是这个变化最主要的驱动力，故答案为Hotter air has more capacity to hold moisture。
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