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英语四级阅读理解模拟试题及答案详解22免费下载，
ge in short, jerky movement. We recognize words usually when our eyes are still when they fixate. Each time they fixate, we see a group of words. This is known as the recognition span or the visual span. The length of time ofr which the eyes stop ---the duration of the fixation varies considerably
英语四级阅读理解模拟试题及答案详解22
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