愤怒的小鸟是一款“亿人迷”的游戏，据说大家喜欢它的原因在于大家喜欢抛物线胜过直线。例题8.15-8.16是笑脸图片直线运动的例子，请修改它的运动轨迹，将它改成抛物线运动。-Angry bird is a million fans, the game, said that everyone likes it because of you like a parabola than a straight line. Example 8.15-8.16 smiley picture examples o