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图表数据描述 — 英语词汇题

考研英语(二) 写作 AI 三重审校通过

题目
请选择最恰当的一项填空,使句子准确描述图表数据:The chart shows the average monthly income of urban residents from 2015 to 2020. Income rose from 3,000 yuan to 6,000 yuan, which means it ______ during the five-year period. A. doubled B. tripled C. halved D. fluctuated