Onedayaprofessorwalk的知识精选

Oneday,aprofessorwalkedintotheclassroomandaskedhisstude...
问题详情:Oneday,aprofessorwalkedintotheclassroomandaskedhisstudentstogetreadyforasurprisetest.Theywaited 41 attheirdesksforthetesttobegin.Theprofessor  42  thequestionpapers,withthetextfacingdown...
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