2010 Sichuan Question 3 Free-response Differentiating 2010_省自主命题(四川) 3.(5 分)(2010•四川)抛物线 $y^2=8x$ 的焦点到准线的距离是( ) A. 1B. 2C. 4D. 8 Answer keyC ☆ SaveCan't do it, show the explanation查看原卷 →