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北京市物价局信息处今年3月对城近郊区187户居民(687人)进行了为期一个月的蔬菜逐日登记调查.通过调查发现:
The information bureau of the Beijing Municipal Price Bureau conducted a one-month registration of vegetables for 187 households (687 people) in and around the city in March this year. Through the survey, it was found that: