求翻译：五个学校总共60位初中英语教师接受了问卷调查，共发放60份问卷，收回60份，剔除不合格问卷5份，共有55份合格，有效率达90．2％。是什么意思？

A total of 60 schools, five junior high school English teacher received a questionnaire survey, a total of 60 questionnaires, 60 were recovered, excluding unqualified questionnaires five, a total of 55 were eligible, the effective rate of 90.2%.

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Five school altogether 60 junior middle school English teacher has accepted the questionnaire survey, altogether provides 60 questionnaire, takes back 60, rejects unqualified questionnaire 5, altogether has 55 qualified, effectiveness reaches 90.2%.

Five schools a total of 60 junior middle school English teachers to receive a questionnaire, issuing a total of 60 questionnaires, recovering 60 to screen out unqualified questionnaire 5, a total of 55 qualified, effective rate of 90 per cent. 2%.

English teacher accepted the questionnaire investigation in five schools and 60 junior middle schools altogether, released 60 questionnaires together, regain 60, reject not up to standard questionnaire 5 part, have in all 55 copy efficient to up to 90.2% qualified.