2. 自考
  3. A. produces much more global warming than a carbon-dioxide forcing of the same magnitude B. contributed to 25 percent of observe

A. produces much more global warming than a carbon-dioxide forcing of the same magnitude B. contributed to 25 percent of observe

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问题 A. produces much more global warming than a carbon-dioxide forcing of the same magnitude
B. contributed to 25 percent of observed global warming
C. winter and spring
D. the warming effects increase
E. still surpass soot in warming the world’s climate during the last century
F. can be seen mostly in the Northern Hemisphere
If snow and ice covered areas begin melting,___________.
选项
答案D
解析 本题定位到第三段的第二句话，可知一旦冰雪融化，温室效应就会加剧。
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