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In the figure above, PQ is a diameter of cirde O, PR= SQ, and ΔRST is equilateral. If the
length of PQ is 2, what is the length of RT?
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分析B选项
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分析E选项
我有更好的解析 
暂无雷哥网文字解析
OT=1
再利用特殊三角形边长比计算
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问题求解PS
来源：
GMAT难题300合集
题目信息2m16s
平均耗时
84.9%
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