• 2022-06-03
    设A为含命题变项p 、q、r的重言式,则公式[tex=6.929x1.357]2wciExaXo6KWMD/Tg8PnZLnQhmmzuX5fslw4MtNrcK4WSAfAFzbmWYk10jtQmUL4[/tex]的类型为[input=type:blank,size:8][/input]