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  3. [A]existing[I]analysis [B]consumers[J]Enormously [C]released[K]identify [D]derivation[L]compelling [E]chief[M]ad

[A]existing[I]analysis [B]consumers[J]Enormously [C]released[K]identify [D]derivation[L]compelling [E]chief[M]ad

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问题     [A]existing[I]analysis
    [B]consumers[J]Enormously
    [C]released[K]identify
    [D]derivation[L]compelling
    [E]chief[M]address
    [F]emissions[N]Eventually
    [G]enchant[O]diversion
    [H]high-polluting
    The most detailed data yet on emissions of heat-trapping gases show that US power plants are responsible for the bulk of the pollution blamed for global warming.
    Power plants【C1】______72% of the greenhouse gases reported to the Environmental Protection Agency for 2010, according to information released Wednesday that was the first catalog of global warming pollution by facility. The data include more than 6,700 of the largest industrial sources of greenhouse gases, or about 80 percent of total US【C2】______.
    According to an Associated Press【C3】______of the data, 20 mostly coal-fired power plants in 15 states account for the top-releasing facilities.
    Gina McCarthy, the top air official at the EPA, said the database marked "a major milestone" in the agency’s work to【C4】______climate change. She said it would help industry, states and the federal government identify ways to reduce greenhouse gases.
    The Obama administration plans to regulate emissions of heat-trapping gases under【C5】______law. A proposed regulation to address pollution from new power plants could be released as early as this month.【C6】______, the EPA will have to tackle facilities already in operation. The largest emitters will be the first in line.
    The largest greenhouse gas polluter in the nation in 2010, according to the EPA’s data, was the Scherer power plant in Juliette, Ga. , owned by Southern Company. That coal-fired power plant reported releasing nearly 23 million metric tons of carbon dioxide, the【C7】______greenhouse gas, in 2010.
    Two other power plants owned by Southern were the second-and third-largest polluters nationally: the Bowen plant in Bowen, Ga. , and the James H. Miller, Jr. power plant in Quinton, Ala.
    American Electric Power, another large coal-fired power producer, has three power plants in the top 20. They are in Rockport, Ind. , Cheshire, Ohio, and St. Albans, W. Va.
    "This is just another way to【C8】______the largest coal-fired power plants in the country," said AEP spokesman Pat Hemlepp. "We always assumed we would be No. 1 in greenhouse gas emissions or No. 2 behind Southern Co. We and Southern are the two largest【C9】______of coal. "
    The other states with【C10】______power plants are Texas, Michigan, Missouri, Montana, Pennsylvania, Arizona, Wyoming, North Carolina, Kansas and Kentucky.
    Refineries were the second-largest source of greenhouse gas emissions, with 57% of the reported total. The top states in greenhouse gas emissions from power plants and from refineries were Texas, Pennsylvania, Florida, Ohio, and Indiana.
    Congress required industries to report their emissions as part of a 2008 spending bill. Until now, the agency has estimated greenhouse gas emissions by industry sector.
【C7】
选项
答案E
解析 根据空格后的greenhouse gas可推断，此处缺少形容词作定语。空格所在的部分是carbondioxide的同位语，而carbon dioxide是温室气体的主要成分，故[E]chief“主要的”为答案。
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