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一、调查目的、方法和样本情况此次调查采用随机抽样的方法 ,共发放问卷１６５００份 ,回收有效问卷１４６０９份 ,有效回收率为８８．５４%。调查范围遍及浙江省的杭州、宁波、嘉兴、湖州、绍兴、舟山、台州、金华、衢州、丽水、温州等１１个地市的８７所学校 ,其中有城镇中学
First, the purpose of the survey, methods and sample situation The survey using a random sampling method, a total of 16,500 questionnaires were distributed, the effective questionnaire was recovered 14,609, the effective recovery rate was 88.54%. The survey covers 87 schools in 11 cities and districts in Hangzhou, Ningbo, Jiaxing, Huzhou, Shaoxing, Zhoushan, Taizhou, Jinhua, Quzhou, Lishui and Wenzhou in Zhejiang Province. Among them,