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峰神，我爱你

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XYJK1002

#1 Created at ... [Delete] [Delete and Lock User] 
在此插入代码

-- coding" utf-8 --

s1 = 72 s2 = 85 r =(s2-s1)/s1

print(r)

print("小明的成绩提高了：%.2f%%" % (r*100))

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