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题目来源：
OG5 阅读 Q39
正确答案：B
题目详解
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Choice B is the best answer. The figure shows that while the mean score of the control comments in the politics category is below 2.0, the artificially up-voted mean score for that category is exactly 2.5.
Choice A is incorrect because the artificially up-voted mean score of comments in the business category is higher than 3.0. Choice C is incorrect because the artificially up-voted mean score of comments in the fun category is less than 2.5. Choice D is incorrect because the artificially up-voted mean score of the comments in the general news category is just over 2.0.
Choice A is incorrect because the artificially up-voted mean score of comments in the business category is higher than 3.0. Choice C is incorrect because the artificially up-voted mean score of comments in the fun category is less than 2.5. Choice D is incorrect because the artificially up-voted mean score of the comments in the general news category is just over 2.0.
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