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[英语六级巅峰阅读附详解] 英语六级巅峰阅读附详解 第65期:视力研究
判断人的视力是否完好的标准是看他是否在看Snellen视力表的时候能毫无障碍地达到20/20的视力。[1]测试值取决于从20英尺之外,你能看到多少行大小不一的字母。2015-06-06 编辑:wendy
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2015-06-06 编辑:wendy