A soot forcing is unusually effecti

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A soot forcing is unusually effective, which_________

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 warming the world’s climate during the last century

F

can be seen mostly in the Northern Hemisphere

参考答案:

正确答案考点:概括段落大意和补全句子