某人沿坡度i=3：4的斜坡前进了100米，则他所在的位置比原来升高了（ ）米。
60
以抛物线x2=16y的焦点为圆心,且与抛物线的准线相切的圆的方程为_________.
Advertisers tend to think big and perhaps this is why they’re always coming in for criticism.
