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题目材料:

Which of the following, if true, would most weaken the author's argument that the ability of the United States to absorb more carbon dioxide than it produces is not a result of efforts to protect the environment?
  • AThe United States has intentionally increased its consumption of energy derived from non-fossil-fuel sources
  • BThe United States has intentionally decreased its carbon dioxide emissions from fossil-fuel combustion in recent decades.
  • CThe United States has changed its stance on environmental concerns in recent years.
  • DCarbon dioxide is not the only gas that is emitted during fossil- fuel combustion.
  • ECarbon dioxide emissions from fossil-fuel combustion do not account for most of the carbon dioxide in the atmosphere

B显示答案

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