四人抢答器的设计 具有主持人复位功能； 两个四人抢答器可直联成八人抢答器； 数字显示选手编号：单机使用时，显示1-4号选手；联机测量时，显示1-8号选手。(Design of four-person answering device Has a moderator reset function; Two four-person responders can be directly connected into an eight-person responder; The number shows