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  • 問題詳情：     Asurveybasingon1,000studentsfoundthathalfofthepupilsand80%ofthemiddleschoolstudentssleepslessthanninehourseverynight.Toomanyhomeworkgivenbyschoolteachersandparentsisthemainreasons.Otherreasonliesinstudents’badhabits.Somestudents,fo...
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