id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
bece-71	Gao, Jing; Liu, Jing; Feng, Hong; Zhang, Zhixin	Relationship between Time Length of E-learning Environment Using and Physical Health of Elementary and Middle School Students	2019	10	.pdf	application/pdf	4601	156	51	Comparison of the Degree of Different Semesters Students’ Respiratory Rate Affected by the Time Length of E-learning Environment Using Each Week In order to explore the extent to which the respiratory rate of students of different se- mesters was affected by the time length of e-learning environment using each week, we used Covariance Analysis to analyze the data of middle school students and elementary school students, respectively. Comparison of the Degree of Different Semesters Students’ Body Mass Index Affect- ed by the Time Length of E-learning Environment Using Each Week In order to explore the extent to which the Body Mass Index of students of different semesters was affected by the time length of e-learning environment using each week, we used Covariance Analysis to analyze the data of middle school students and elemen- tary school students, respectively.	cache/bece-71.pdf	txt/bece-71.txt