2009 Hunan Question 4 Single-choice Differentiating 2009_退役省自主命题 (2009·文) 2.(5分)(2009•湖南)抛物线$y2=4x$的焦点坐标是( ) A. (4,0)B. (2,0)C. (1,0) Answer keyC ☆ SaveCan't do it, show the explanation查看原卷 →