2. 外语
  3. The idea of ______ might worsen the problem of global warming is different to the traditional idea that planting trees can slow

The idea of ______ might worsen the problem of global warming is different to the traditional idea that planting trees can slow

admin2009-04-23  68
问题 The idea of ______ might worsen the problem of global warming is different to the traditional idea that planting trees can slow down global warming.
What element is quite helpful in preventing a place from getting warmer in higher latitudes?
选项
答案The snow cover
解析 本题题干中关键字不太明显，但题干中的a place和原文第二段末句中的locally呼应。定位到这句话 If you plant new trees，the canopy covers that snow and very little sunlight is reflected．That’s why when you plant trees there is a potential for locally warming a place(如果你在高纬度地区种树，树冠将地面上的雪遮盖，这样太阳光很少能被反射。这就是植树会使高纬度局部地区温度增高的原因)，由此可作判断，地面上积雪覆盖是防止高纬度地区气温升高的一个有利因素。
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