The brand new authenticity and you will accuracy of survey were tested and you may fixed in line with the pre-decide to try

The brand new authenticity and you will accuracy of survey were tested and you may fixed in line with the pre-decide to try Toward , this research chosen a couple categories in the Chengdu Shishi secondary school and you can Jinniu secondary school respectively, delivered 300 questionnaires, retrieved 278 forms, subtracted twelve incorrect surveys and …

The brand new authenticity and you will accuracy of survey were tested and you may fixed in line with the pre-decide to try 더 보기 »