The student in a T-shirt is from Xuancheng.

穿T-恤衫的那位先生是宣城人。

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There was significant difference between two groups by using Student t test(P<0.05).

经配对t检验表明二者间有显著性差异（P<0.05）；

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There was significant difference between two groups by using Student t test(P<0.05).

经配对t检验表明二者间有显著性差异（P<0.05）；

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