2016 National Question 3 Single-choice Differentiating 2016_退役省自主命题 (2016·文) 3.抛物线 $y^{2}=4 x$ 的焦点坐标是 A. $(0,2)$B. $(0,1)$C. $(2,0)$D. $(1,0)$ Answer keyD ☆ SaveCan't do it, show the explanation查看原卷 →