【题目】In the past decade the number of the workers in the factory(下降) by 15%.
在线课程【答案】has decreased
【解析】句意：在过去的十年间这家工厂的工人人数下降了15%。 decrease是指在此之前的十年间的持续状态，用现在完成时态，故填has decreased 。
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In the past decade the number of the workers in the factory by 15%.
编辑：chaxungu时间：2026-04-27 03:02:29分类：高中英语题库
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