Data came from questionnaires completed by parents.
数据来自于家长填写的调查问卷。
Questionnaires completed on Monday and Tuesday showed much higher levels of self-reported fatigue and tiredness compared with pre sleep in days.
问卷完成后显示，自我感觉困乏和疲惫的水平在星期一星期二会比按时就寝的日子高出很多。
The questionnaires completed by 1986 middle-school students show that they take an active attitude towards research-type of studies, but they also meet with some problems and difficulties.
研究通过对1986名中学生进行问卷调查，发现中学生对研究性学习的开展态度比较积极，但同时也遇到一定的困难和阻力。
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