GRE
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题目材料：
In a survey, 100 travel agents each ranked Airlines A,B and C in order of preference. Each of the 100 travel agents also rated the three airlines in five categories on a scale of 1 through 10, with 10 being the best rating.
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GRE 考神 2017-12-01 12:23:23
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In a survey, 100 travel agents each ranked Airlines A,B and C in order of preference. Each of the 100 travel agents also rated the three airlines in five categories on a scale of 1 through 10, with 10 being the best rating.
