(72ab92) AP CS Principles (72ab92) AP 计算机科学原理 1.9 Additional Practice   1.9 附加练习

Greg is designing a Scratch game in which the player moves a sprite by pressing the arrow keys. Greg writes the following scripts for the sprite: Greg 正在设计一款 Scratch 游戏，玩家可以通过按方向键来移动精灵。Greg 为该精灵编写了以下脚...