单项选择题
A.循环播放开关B.启动播放开关C.音量大小调节开关D.声道选择开关
A.Component-Physics-Box ColliderB.Component-Effects-Box ColliderC.Component-Playables-Box ColliderD.Component-Event-Box Collider
A.DefaultB.Normal mapC.LightmapD.Sprite (2D and UI)