Excuse me, the pressure on the stratosphere test paper!

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【Teacher changes exam papers on a flight during business trip goes viral; netizens ask: What is the pressure of the exam papers in the stratosphere?】 】On December 29th, a photo of a teacher in Foshan, Guangdong, marking exam papers on an airplane went viral on social media. It is understood that Teacher Pan corrected the papers in the air because it was near the end of the term, and she faced the pressure of having to prepare exam papers on top of a full schedule It was so bad that I had to go to Shanghai to serve as a judge in a national competition; I had to grade the papers while on the trip, and it took me 5 hours in total to grade all 210 papers. A netizen left a witty comment: “May I ask what the pressure of the test paper is in the stratosphere?” ”Tell the students: How many kilometers is your test paper above the ground? What is the potential energy? ”Some students also asked curiously, \"Teacher, will the corrected papers be sent back by courier?\" Teacher goes viral for grading exams on plane during business trip; completed 210 exams in 5 hours