请用门电路设计一个智力抢答器。说明:设有A B C三人参加抢答,裁判D为一人,每人控制一单刀双掷开关。当裁判D允许抢答时给抢答指令, A B C谁先给出答题信号(A B C D的有效电平为高电平),标志该答题者的光显示发光,其余两人再要求答题无效,对应的光显示不亮。
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【单选题】More Than Just Money When Patricia Rochester decided to go back to school after ten years as a staff nurse at Toronto Western Hospital, her employer not only cheered her on, but also paid her tuition ...