l、设计用于竞赛的四人抢答器，功能如下： (1) 有多路抢答器，台数为四； (2) 具有抢答开始后20秒倒计时，20秒倒计时后无人抢答显示超时，并报警； (3) 能显示超前抢答台号并显示犯规警报； (4) 能显示各路得分，并具有加、减分功能； 2、系统复位后进入抢答状态，当有一路抢答键按下

[qingdaqi.rar] - 四路抢答器，超时报警，提前抢答报警，计分等

-l, designed for race four Responder, functions as follows: (1) a number of road Responder, Taiwan, the number is four　(2) has the answer in 20 seconds after the beginning of the countdown, 20 seconds after the countdown show no answer in overtime, and alarm　(3) can show answer in advance and display the foul alarm station number　(4) to display scores from various quarters, and with addition, subtraction, sub-functions　2, enter the answer in the state after a system reset, when a key is pressed all the way Responder [qingdaqi.rar]- Quad Responder, time-out alarm, alarm answer in advance, namely, classification