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已知抛物线C:y2=8x的焦点为F,准线为l,P是l上一点,Q是直线PF与C的一个交点,若=4,则|QF|=( )
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高二上学期数学《2017-2018学年湖南省浏阳一中、醴陵一中、南方中学高二(上)12月联考数学试卷(文科)》真题及答案
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