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#!/usr/bin/ruby
# -*- coding: UTF-8 -*-
score = 70
result = case score
when 0..40
    "糟糕的分数"
when 41..60
    "快要及格"
when 61..70
    "及格分数"
when 71..100
    "良好分数"
else
    "错误的分数"
end
puts result
 
 
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