2010 Sichuan Question 3 Single-choice Differentiating 2010_Sichuan卷 (数学) 3. (5分) (2010•四川)抛物线$y2=8x$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 →