（Invite two students to proceed the game, one person perform the diagram slice for seeing of, one person to guess, and time limit to 30 seconds.
（Invite two students to proceed the game, one person perform the diagram slice for seeing of, one person to guess, and time limit to 30 seconds.
请两位学生进行游戏，一人表演所看到的图片，一人猜，时间限制为30秒。）