设计一个可容纳四组参赛者同时抢答的数字抢答器，可判断第一抢答者并报警指示抢答成功，其他组抢答均无效。若提前抢答则对相应的抢答组发出警报。同时还具有计分功能，若抢答成功并回答正确增加1分，答错不扣分。- Designed to accommodate a four contestants answer in the same time the number of Responder, First Responder who can determine the answer in the suc