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This passage is mainly about how the development of airline industry has affected the environment through its greenhouse gases e
This passage is mainly about how the development of airline industry has affected the environment through its greenhouse gases e
admin
2009-09-12
29
问题
This passage is mainly about how the development of airline industry has affected the environment through its greenhouse gases emission.
Although aviation accounts for only 3% of the total man-made emission, its______ are believed to be disproportionately damaging to the environment.
选项
答案
high-altitude emissions
解析
答案在第三部分第二段开头。
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0
大学英语四级
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