所设计的抢答器允许四人参加。在出题后，红色发光二极管点亮，同时显示器显示秒信号，A、B、C、D四人按动按钮以决定先后次序，计时到60s之后即依次显示四个人的名次，若超过60s未按按钮者不计名次。在红灯亮前按下按钮者也不计名次。-The Responder is designed to allow four people to participate. In a later question, the red light-emitting diodes lit at the same time display shows second signal, A, B, C, D four pressing the button in order to determine the order after that time to the 60s followed by shows four of the ranking, if not more than 60s Rank excluding those who press the button. Press the button before the red light do not even count ranking.