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

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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 wanning
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
Warning in the Northern Hemisphere was large in________at middle and high latitudes.

选项

答案C

解析 本句定位到第七段的首句,在春季和冬季,中高纬度地区的气温变化最为明显。
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