OG 83题 In 2000, a mere two dozen products accounted for half the increase in spending on prescription drugs, a phenomenon that is explained not just by the fact that drugs are becoming more expensive but also by the fact that doctors are writing many more prescriptions for higher-cost drugs. 这里a phenomenon... 整个句子是什么成分啊？想不通啊
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发表于 2012-3-7 19:34:54
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