方法通过多级随机抽样抽取济南市4所初中550名初一学生，采用问卷调查。

方法通过多级随机抽样抽取济南市4所初中550名初一学生，采用问卷调查。的英文翻译

基本释义

• Methods A total of 550 students in 4 junior schools were sampled with multistage sampling and surveyed.