critics of nuclear power complain about the allegedly serious harm that might result from continued operation of existing nuclear power plants.But such concerns do not justify closing these plants;after all,their operation has caused no more harm than that caused by pollution generated by coal and oil-burning power plants,the most important other sources of energy.
B.Closing existing nuclear power plants would require greatly increased reliance on coal and oil-burning power plants.
D.The harm that a nuclear power plant is likely to cause as it continues to operate can be reliably predicted from the past history of nuclear power plants.
答案是D。说B中若去掉greatly可以作为一个假设。为什么？
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发表于 2010-9-3 10:02:42
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