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- 问题详情：Childrenwithnoshoesondobetteratschoolthanthosewithshoeson,astudysuggests.Forover10years,researchersfromuniversitiesobserved(观察)childrenin100schoolsfrom25countries.Theyfoundthatclassroomswerequieterwhenchildrentookofftheirshoes.Itprovidedaqu...
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